Conduct disorder is a disruptive behavior disorder characterized by a repetitive and persistent pattern of aggressive, antisocial, deceitful, or rule-violating behavior that infringes the rights of others or age-appropriate norms.
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Conditions with similar clinical presentations that must be differentiated from Conduct Disorder:
name: Conduct Disorder
creation_date: "2026-04-24T20:56:38Z"
updated_date: "2026-05-02T00:00:00Z"
category: Psychiatric
description: >-
Conduct disorder is a disruptive behavior disorder characterized by a
repetitive and persistent pattern of aggressive, antisocial, deceitful, or
rule-violating behavior that infringes the rights of others or
age-appropriate norms.
disease_term:
preferred_term: conduct disorder
term:
id: MONDO:0005352
label: conduct disorder
parents:
- Mental Health Disorder
has_subtypes:
- name: Childhood-onset conduct disorder
classification: DSM-5 age-of-onset specifier
description: >-
Conduct-disorder subtype where at least one conduct-disorder symptom is
present before age 10 years; this specifier is clinically important for
prognosis and service planning.
evidence:
- reference: clinicaltrials:NCT02828969
reference_title: Clinical Trajectory of Children and Adolescents With Disruptive Behavior Admitted to Pediatric and Psychiatric Emergencies.
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: >-
The Trajectories project is designed to describe children and adolescents
with disruptive behaviors, their care management and to follow their life
trajectory and psychiatric evolution after admission to emergency rooms.
explanation: >-
The trajectory study supports child and adolescent CD-spectrum
presentations; the age-of-onset threshold is a DSM clinical specifier.
- name: Adolescent-onset conduct disorder
classification: DSM-5 age-of-onset specifier
description: >-
Conduct-disorder subtype where conduct-disorder symptoms emerge in
adolescence without symptoms before age 10 years.
evidence:
- reference: clinicaltrials:NCT02828969
reference_title: Clinical Trajectory of Children and Adolescents With Disruptive Behavior Admitted to Pediatric and Psychiatric Emergencies.
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: >-
The Trajectories project is designed to describe children and adolescents
with disruptive behaviors, their care management and to follow their life
trajectory and psychiatric evolution after admission to emergency rooms.
explanation: >-
The trajectory study supports adolescent CD-spectrum presentations; the
age-of-onset threshold is a DSM clinical specifier.
- name: Conduct disorder with limited prosocial emotions
classification: DSM-5 specifier
description: >-
Conduct-disorder specifier marked by persistent callous-unemotional traits
such as low remorse, low empathy, shallow affect, or limited concern about
performance; this subgroup has greater antisocial risk and symptom severity.
evidence:
- reference: DOI:10.1111/jcpp.13774
reference_title: "Treatment of childhood disruptive behavior disorders and\n <scp>callous‐unemotional</scp>\n traits: a systematic review and two multilevel\n <scp>meta‐analyses</scp>"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Children with callous‐unemotional (CU) traits are at high lifetime risk
of antisocial behavior.
explanation: >-
Meta-analysis background supports CU traits as a clinically meaningful
limited-prosocial-emotions specifier.
prevalence:
- population: community children and adolescents
percentage: 3
notes: >-
CD affects approximately 3% of school-aged children, with a 2:1 male to
female ratio.
evidence:
- reference: PMID:31249310
reference_title: Conduct disorder.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
CD affects ~3% of school-aged children and is twice as prevalent in
males than in females.
explanation: >-
Nature Reviews Disease Primers review provides prevalence and sex ratio.
- reference: DOI:10.1186/s13034-024-00710-6
reference_title: "Recognition and management of children and adolescents with conduct disorder: a real-world data study from four western countries"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Conduct disorders (CD) are among the most frequent psychiatric disorders
in children and adolescents, with an estimated worldwide prevalence in
the community of 2–4%.
explanation: >-
Real-world data study introduction provides an estimated community
prevalence range.
pathophysiology:
- name: Intergenerational Polygenic Liability
description: >-
Conduct problems show polygenic transmission from parental characteristics
to child conduct problems, supporting a heritable liability component
embedded in family development.
downstream:
- target: Childhood Aggression Genetic Architecture
description: >-
Polygenic transmission is represented upstream of aggression-related
genetic liability and behavioral outcomes.
evidence:
- reference: DOI:10.1038/s41380-023-02383-7
reference_title: "Examining intergenerational risk factors for conduct problems using polygenic scores in the Norwegian Mother, Father and Child Cohort Study"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The aetiology of conduct problems involves a combination of genetic and
environmental factors, many of which are inherently linked to parental
characteristics given parents’ central role in children’s lives across
development.
explanation: >-
Trio study frames conduct problems as genetically and environmentally
influenced.
- reference: DOI:10.1038/s41380-023-02383-7
reference_title: "Examining intergenerational risk factors for conduct problems using polygenic scores in the Norwegian Mother, Father and Child Cohort Study"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
We found significant genetic transmission effects on conduct problems
for 12 out of 13 PGS at age 8 years
explanation: >-
The MoBa trio analysis supports genetic transmission effects.
- name: Childhood Aggression Genetic Architecture
description: >-
Persistent aggression, a central conduct-disorder behavior domain, has
substantial genetic contribution, but candidate-gene and GxE findings are
heterogeneous and not ready for deterministic interpretation.
downstream:
- target: Persistent Antisocial and Aggressive Behavior
description: >-
Aggression-related genetic liability is represented upstream of the
clinical aggressive-behavior phenotype.
evidence:
- reference: DOI:10.1038/s41398-024-02870-7
reference_title: "Genetics of child aggression, a systematic review"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
While half of the variance in childhood aggression is attributed to
genetic factors, the biological mechanism and the interplay between genes
and environment that results in aggression remains elusive.
explanation: >-
Systematic review supports genetic contribution but emphasizes unresolved
mechanisms.
- reference: DOI:10.1038/s41398-024-02870-7
reference_title: "Genetics of child aggression, a systematic review"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
investigation of candidate genes, especially of MAOA (17 studies), DRD4
(13 studies), and COMT (12 studies) continue to dominate the field
explanation: >-
Review identifies commonly studied aggression candidate genes.
- name: Amygdala-Mediated Empathy Deficit
description: >-
In the conduct-disorder subgroup with callous-unemotional traits, deficient
empathy is linked to reduced amygdala responses to fearful facial
expressions and impaired recognition of distress in others.
cell_types:
- preferred_term: neuron
term:
id: CL:0000540
label: neuron
locations:
- preferred_term: amygdala
term:
id: UBERON:0001876
label: amygdala
downstream:
- target: Callous-Unemotional Trait Severity
description: >-
Amygdala-mediated empathy impairment is represented as an upstream
neurocognitive mechanism for the callous-unemotional conduct-disorder
subgroup.
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Deficient empathy shows a particularly selective association with conduct
disorder accompanied by callous–unemotional traits.
explanation: >-
NEJM review identifies deficient empathy as selective for the
callous-unemotional conduct-disorder subgroup.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Deficient empathy is related to amygdala dysfunction.
explanation: >-
NEJM review links the deficient-empathy mechanism to amygdala dysfunction.
- name: Threat-Circuit Hypersensitivity
description: >-
Youth with conduct disorder who do not have callous-unemotional traits can
show heightened threat-circuit responsiveness across the
amygdala-hypothalamus-periaqueductal gray pathway, increasing risk of
hostile attribution, frustration sensitivity, and reactive aggression.
cell_types:
- preferred_term: neuron
term:
id: CL:0000540
label: neuron
locations:
- preferred_term: amygdala
term:
id: UBERON:0001876
label: amygdala
- preferred_term: hypothalamus
term:
id: UBERON:0001898
label: hypothalamus
- preferred_term: central gray substance of midbrain
term:
id: UBERON:0003040
label: central gray substance of midbrain
downstream:
- target: Persistent Antisocial and Aggressive Behavior
description: >-
Threat-circuit hypersensitivity is modeled as a circuit-level contributor
to reactive aggression in the non-callous-unemotional subgroup.
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The subgroup without callous–unemotional traits exhibits a different
pattern, with atypically elevated threat-circuitry responsiveness
explanation: >-
NEJM review identifies heightened threat-circuit responsiveness in the
conduct-disorder subgroup without callous-unemotional traits.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
the amygdala is part of a circuit, encompassing the hypothalamus and
periaqueductal gray matter, that mediates graded responses to threats
explanation: >-
NEJM review defines the threat-response circuit containing amygdala,
hypothalamus, and periaqueductal gray matter.
- name: Striato-vmPFC Decision-Making Deficit
description: >-
Conduct problems are associated with impaired reinforcement-based
decision-making, including deficient negative-prediction-error signaling and
deficient recruitment of the striatum and ventromedial prefrontal cortex.
cell_types:
- preferred_term: neuron
term:
id: CL:0000540
label: neuron
locations:
- preferred_term: striatum
term:
id: UBERON:0002435
label: striatum
- preferred_term: prefrontal cortex
term:
id: UBERON:0000451
label: prefrontal cortex
downstream:
- target: Persistent Antisocial and Aggressive Behavior
description: >-
Deficient reward-punishment learning is modeled upstream of impulsivity,
frustration, and reactive aggression.
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Persons who fail to learn how to make choices that lead to rewards rather
than punishments are at high risk for impulsivity, frustration, and
reactive aggression.
explanation: >-
NEJM review links deficient reward-punishment learning to impulsivity,
frustration, and reactive aggression.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
youth with conduct problems show deficits in negative-prediction-error
signaling, manifested by deficient recruitment of the striatum and
ventromedial prefrontal cortex.
explanation: >-
NEJM review identifies striatal and ventromedial prefrontal recruitment
deficits during reinforcement learning.
- name: Persistent Antisocial and Aggressive Behavior
description: >-
The core behavioral mechanism is persistent violation of rules and rights,
often expressed through aggressive, antisocial, or defiant behavior that
requires social, clinical, and sometimes justice-system response.
cell_types:
- preferred_term: neuron
term:
id: CL:0000540
label: neuron
locations:
- preferred_term: amygdala
term:
id: UBERON:0001876
label: amygdala
- preferred_term: prefrontal cortex
term:
id: UBERON:0000451
label: prefrontal cortex
evidence:
- reference: clinicaltrials:NCT02828969
reference_title: Clinical Trajectory of Children and Adolescents With Disruptive Behavior Admitted to Pediatric and Psychiatric Emergencies.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Conduct disorders are defined as "repetitive and persistent pattern of
behavior in which the basic rights of others or major age-appropriate
norms are violated".
explanation: >-
ClinicalTrials.gov trajectory study provides a concise conduct-disorder
behavioral definition.
- reference: clinicaltrials:NCT00676429
reference_title: Ziprasidone for Severe Conduct and Other Disruptive Behavior Disorders in Children and Adolescents - a Placebo Controlled, Randomized, Double Blind Clinical Trial
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The main characteristic of these disorders is a repetitive and persistent
pattern of antisocial, aggressive or defiant behavior that involves major
violations of age-appropriate expectations or norms.
explanation: >-
Trial background supports the aggressive and antisocial behavior node.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Youth conduct problems are predictive of an increased risk of substance
abuse, criminal behavior, and educational disruption
explanation: >-
NEJM review documents the long-term antisocial outcomes of conduct
problems.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Antisocial personality disorder, which has a particularly poor prognosis,
develops in slightly less than 50% of patients with conduct disorder
explanation: >-
NEJM review provides the rate of progression to antisocial personality
disorder.
- name: Callous-Unemotional Trait Severity
description: >-
Callous-unemotional traits identify a clinically important disruptive
behavior subgroup with higher antisocial risk and greater symptom severity,
while still showing improvement in disruptive behavior symptoms with
treatment.
downstream:
- target: Persistent Antisocial and Aggressive Behavior
description: >-
CU traits are modeled as a severity modifier that can intensify or
stabilize antisocial behavior trajectories.
evidence:
- reference: DOI:10.1111/jcpp.13774
reference_title: "Treatment of childhood disruptive behavior disorders and\n <scp>callous‐unemotional</scp>\n traits: a systematic review and two multilevel\n <scp>meta‐analyses</scp>"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Children with callous‐unemotional (CU) traits are at high lifetime risk
of antisocial behavior.
explanation: >-
Meta-analysis background supports CU traits as a risk/severity dimension.
- reference: DOI:10.1111/jcpp.13774
reference_title: "Treatment of childhood disruptive behavior disorders and\n <scp>callous‐unemotional</scp>\n traits: a systematic review and two multilevel\n <scp>meta‐analyses</scp>"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
DBD+CU children improve with treatment, but their greater DBD symptom
severity requires specialized treatment modules that could be implemented
alongside parenting programs.
explanation: >-
Meta-analysis conclusion supports CU traits as a clinically relevant
modifier of severity and treatment planning.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Callous–unemotional traits, which occur in fewer than half of young
persons with conduct disorder, identify a subgroup with distinctive
clinical features and neurocognitive perturbations.
explanation: >-
NEJM review establishes CU traits as identifying a distinctive subgroup
with unique neurocognitive features.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
As compared with youth with conduct disorder who show remorse, empathy,
and concern about school performance, those with callous–unemotional
traits have a poorer prognosis and treatment response.
explanation: >-
NEJM review confirms poorer prognosis in CU-trait subgroup.
- name: Psychosocial Intervention Response
description: >-
Evidence-based parent-management and parent-child interventions reduce
disruptive behavior, indicating that family and social-learning mechanisms
are modifiable downstream contributors.
downstream:
- target: Persistent Antisocial and Aggressive Behavior
description: >-
Psychosocial interventions are modeled as modulating the persistent
disruptive and aggressive behavior mechanism.
evidence:
- reference: DOI:10.1007/s10578-022-01367-y
reference_title: "The Efficacy of Parent Management Training With or Without Involving the Child in the Treatment Among Children with Clinical Levels of Disruptive Behavior: A Meta-analysis"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Results showed that PMT (g = 0.64 [95% CI 0.42, 0.86]) and PCIT
(g = 1.22 [95% CI 0.75, 1.69]) were more effective than waiting-list
(WL) in reducing parent-rated disruptive behavior
explanation: >-
Meta-analysis supports parent-focused intervention effects on disruptive
behavior.
phenotypes:
- name: Aggressive Behavior
category: Behavioral
description: >-
Aggression is a core conduct-disorder behavior domain, encompassing physical
aggression toward people or animals, destruction of property, and
confrontational antisocial acts.
frequency: VERY_FREQUENT
phenotype_term:
preferred_term: Aggressive behavior
term:
id: HP:0000718
label: Aggressive behavior
evidence:
- reference: PMID:31249310
reference_title: Conduct disorder.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Conduct disorder (CD) is a common and highly impairing psychiatric
disorder that usually emerges in childhood or adolescence and is
characterized by severe antisocial and aggressive behaviour.
explanation: >-
Nature Reviews Disease Primers review identifies severe antisocial and
aggressive behaviour as the defining characterization.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The term "conduct problems" refers to a pattern of repetitive
rule-breaking behavior, aggression, and disregard for others.
explanation: >-
NEJM review defines conduct problems as including aggression.
- name: Atypical Rule-Violating Behavior
category: Behavioral
description: >-
Persistent rule-violating, deceitful, or rights-violating behavior is a
defining conduct-disorder presentation that infringes on the rights of
others or major age-appropriate norms.
frequency: VERY_FREQUENT
phenotype_term:
preferred_term: Rule-violating behavior
term:
id: HP:0000708
label: Atypical behavior
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The term "conduct problems" refers to a pattern of repetitive
rule-breaking behavior, aggression, and disregard for others.
explanation: >-
NEJM review defines conduct problems as including repetitive
rule-breaking behavior.
- name: Impulsivity
category: Behavioral
description: >-
Impulsive behavior is a prominent feature of conduct disorder, contributing
to poor decision-making, frustration, and reactive aggression. Deficits
in reinforcement-based decision-making are consistently found.
phenotype_term:
preferred_term: Impulsivity
term:
id: HP:0100710
label: Impulsivity
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
These early signs involve aggressive tendencies, impulsivity, and failure
to comply with requests
explanation: >-
NEJM review identifies impulsivity as an early sign of conduct disorder.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Persons who fail to learn how to make choices that lead to rewards rather
than punishments are at high risk for impulsivity, frustration, and
reactive aggression.
explanation: >-
NEJM review links impulsivity to deficient decision-making circuitry.
- reference: PMID:31249310
reference_title: Conduct disorder.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
CD is associated with neurocognitive impairments
explanation: >-
Nature Reviews Disease Primers review supports neurocognitive impairments
including impulsivity-related deficits.
- name: Deficient Empathy
category: Behavioral
description: >-
Deficient empathy is selectively associated with the callous-unemotional
traits subgroup of conduct disorder. It manifests as minimal emotional
responses and impaired ability to recognize distress in others, and is
related to amygdala dysfunction.
phenotype_term:
preferred_term: Deficient empathy
term:
id: HP:0031466
label: Impairment in personality functioning
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Deficient empathy shows a particularly selective association with conduct
disorder accompanied by callous-unemotional traits.
explanation: >-
NEJM review establishes deficient empathy as a selective neurocognitive
dysfunction in CU-trait conduct disorder.
- reference: PMID:31249310
reference_title: Conduct disorder.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
the presence or absence of callous-unemotional traits (deficits in
empathy and guilt)
explanation: >-
Nature Reviews Disease Primers review characterizes CU traits as
involving empathy and guilt deficits.
- name: Irritability
category: Behavioral
description: >-
Irritability and emotional dysregulation can occur in disruptive behavior
presentations. Youth without callous-unemotional traits may show heightened
threat sensitivity and reactive aggression in response to frustration or
threat.
phenotype_term:
preferred_term: Irritability
term:
id: HP:0000737
label: Irritability
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The subgroup without callous–unemotional traits exhibits a different
pattern, with atypically elevated threat-circuitry responsiveness
explanation: >-
NEJM review identifies heightened threat sensitivity and reactive
aggression in the non-CU conduct disorder subgroup.
- name: Neurocognitive Impairment
category: Neurological
description: >-
Conduct disorder is associated with neurocognitive impairments including
deficits in emotion processing, emotion regulation, and
reinforcement-based decision-making, with functional abnormalities in
corresponding brain circuits.
phenotype_term:
preferred_term: Cognitive impairment
term:
id: HP:0100543
label: Cognitive impairment
evidence:
- reference: PMID:31249310
reference_title: Conduct disorder.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
CD is associated with neurocognitive impairments; smaller grey matter
volume in limbic regions such as the amygdala, insula and orbitofrontal
cortex, and functional abnormalities in overlapping brain circuits
responsible for emotion processing, emotion regulation and
reinforcement-based decision-making have been reported.
explanation: >-
Nature Reviews Disease Primers review comprehensively describes the
neurocognitive impairments in CD.
- reference: PMID:26650724
reference_title: "Cortical and Subcortical Gray Matter Volume in Youths With Conduct Problems: A Meta-analysis."
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Youths with CP had decreased GMV in the left amygdala (SDM
estimate = -0.218; P < .001) (extending into anterior insula), right
insula (SDM estimate = -0.174; P < .001) (extending ventrolaterally into
the prefrontal cortex and inferiorly into the superior temporal gyrus),
left medial superior frontal gyrus (SDM estimate = -0.163; P = .001)
(extending into the right anterior cingulate cortex), and left fusiform
gyrus (SDM estimate = -0.146; P = .003).
explanation: >-
JAMA Psychiatry meta-analysis quantifies grey matter reductions in
amygdala, insula, and frontal regions.
- name: Reduced Cortisol Stress Reactivity
category: Endocrine
description: >-
Lower hypothalamic-pituitary-adrenal axis and autonomic reactivity to
stress has been reported in conduct disorder, with cortisol
hyporeactivity consistently found in male antisocial populations and
associated with poor treatment outcomes.
phenotype_term:
preferred_term: Abnormality of the hypothalamus-pituitary axis
term:
id: HP:0000864
label: Abnormality of the hypothalamus-pituitary axis
evidence:
- reference: PMID:31249310
reference_title: Conduct disorder.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Lower hypothalamic-pituitary-adrenal axis and autonomic reactivity to
stress has also been reported.
explanation: >-
Nature Reviews Disease Primers review confirms lower HPA axis and
autonomic stress reactivity.
- reference: PMID:30155579
reference_title: Hypothalamic-Pituitary-Adrenal Axis Function in Children and Adults with Severe Antisocial Behavior and the Impact of Early Adversity.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Cortisol hyporeactivity to stress is consistently reported in male
antisocial populations, whereas no comparable data exist in females.
explanation: >-
Systematic review confirms consistent cortisol hyporeactivity in male
antisocial populations.
- reference: PMID:30155579
reference_title: Hypothalamic-Pituitary-Adrenal Axis Function in Children and Adults with Severe Antisocial Behavior and the Impact of Early Adversity.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Severe antisocial behavior is associated with cortisol hyporeactivity to
stress, and such hyporeactivity predicts poor treatment outcomes.
explanation: >-
Cortisol hyporeactivity linked to poor treatment outcomes.
diagnosis:
- name: Clinical Behavioral Assessment
presence: >-
Diagnosis is based on persistent behavioral criteria, impairment, age of
onset, severity, limited-prosocial-emotions traits, comorbidities, and
exclusion of alternative explanations.
diagnosis_term:
preferred_term: clinical assessment
term:
id: MAXO:0000487
label: clinical assessment
evidence:
- reference: clinicaltrials:NCT02828969
reference_title: Clinical Trajectory of Children and Adolescents With Disruptive Behavior Admitted to Pediatric and Psychiatric Emergencies.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Conduct disorders are defined as "repetitive and persistent pattern of
behavior in which the basic rights of others or major age-appropriate
norms are violated".
explanation: >-
The record supports diagnosis by behavioral pattern.
- name: Comorbidity and Service-Use Assessment
presence: >-
Assessment includes ADHD and other psychiatric comorbidities, medication
exposure, hospitalisation, emergency presentation, and social-care context.
diagnosis_term:
preferred_term: clinical assessment
term:
id: MAXO:0000487
label: clinical assessment
evidence:
- reference: DOI:10.1186/s13034-024-00710-6
reference_title: "Recognition and management of children and adolescents with conduct disorder: a real-world data study from four western countries"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Within each country’s study population, the prevalence of CD,
psychiatric comorbidity, psychopharmacological treatment, and psychiatric
hospitalisation was calculated.
explanation: >-
Real-world study supports assessing comorbidity, treatment, and
hospitalisation context.
- name: Biomarkers remain investigational
presence: >-
Biomarkers are not established for routine diagnosis; clinical diagnosis
remains behavioral and contextual.
diagnosis_term:
preferred_term: clinical assessment
term:
id: MAXO:0000487
label: clinical assessment
evidence:
- reference: DOI:10.1002/wps.21037
reference_title: "Candidate diagnostic biomarkers for neurodevelopmental disorders in children and adolescents: a systematic review"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Other important metrics to assess the validity of a candidate biomarker,
such as positive predictive value and negative predictive value, were
infrequently reported.
explanation: >-
Biomarker review supports the need for clinical rather than biomarker-only
diagnosis.
differential_diagnoses:
- name: Oppositional defiant disorder
description: >-
ODD involves oppositional and defiant behavior without the more severe
rights-violating conduct-disorder pattern.
disease_term:
preferred_term: oppositional defiant disorder
term:
id: MONDO:0000495
label: oppositional defiant disorder
evidence:
- reference: clinicaltrials:NCT00676429
reference_title: Ziprasidone for Severe Conduct and Other Disruptive Behavior Disorders in Children and Adolescents - a Placebo Controlled, Randomized, Double Blind Clinical Trial
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
conduct disorder (CD), oppositional defiant disorder (ODD) and disruptive
behavior disorder not otherwise specified (DBD-NOS)
explanation: >-
Trial record distinguishes CD from ODD and other disruptive behavior
disorders.
- name: Attention deficit-hyperactivity disorder
description: >-
ADHD frequently co-occurs with CD and may drive impulsivity or functional
impairment that needs separate assessment.
disease_term:
preferred_term: attention deficit-hyperactivity disorder
term:
id: MONDO:0007743
label: attention deficit-hyperactivity disorder
evidence:
- reference: DOI:10.1186/s13034-024-00710-6
reference_title: "Recognition and management of children and adolescents with conduct disorder: a real-world data study from four western countries"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The rate of psychiatric comorbidity ranged from 69.7 to 86.1%, with
attention-deficit/hyperactivity disorder being most common.
explanation: >-
Real-world cohort supports ADHD as the commonest comorbidity.
- name: Intermittent explosive disorder
description: >-
Intermittent explosive disorder can present with aggressive outbursts, but
lacks the broader persistent pattern of rule violation, deceit, or rights
violation required for CD.
disease_term:
preferred_term: intermittent explosive disorder
term:
id: MONDO:0001521
label: intermittent explosive disorder
evidence:
- reference: DOI:10.1038/s41398-024-02870-7
reference_title: "Genetics of child aggression, a systematic review"
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: >-
Excessive and persistent aggressiveness is the most common behavioral
problem that leads to psychiatric referrals among children.
explanation: >-
Review supports aggression as a broad referral phenotype; the
intermittent explosive disorder distinction is a clinical differential.
- name: Antisocial personality disorder
description: >-
Antisocial personality disorder is an adult diagnosis related to
persistent antisocial behavior and should not be substituted for pediatric
conduct disorder in children.
disease_term:
preferred_term: antisocial personality disorder
term:
id: MONDO:0001164
label: antisocial personality disorder
evidence:
- reference: DOI:10.1111/jcpp.13774
reference_title: "Treatment of childhood disruptive behavior disorders and\n <scp>callous‐unemotional</scp>\n traits: a systematic review and two multilevel\n <scp>meta‐analyses</scp>"
supports: PARTIAL
evidence_source: HUMAN_CLINICAL
snippet: >-
Children with callous‐unemotional (CU) traits are at high lifetime risk
of antisocial behavior.
explanation: >-
CU traits link childhood disruptive behavior to later antisocial
outcomes, supporting adult antisocial behavior as a developmental
differential and outcome consideration.
treatments:
- name: Parent management training
description: >-
Parent management training is an evidence-supported psychosocial treatment
for children with clinical levels of disruptive behavior.
treatment_term:
preferred_term: parent management training
term:
id: MAXO:0000077
label: behavioral counseling
target_phenotypes:
- preferred_term: Rule-violating behavior
- preferred_term: Aggressive behavior
term:
id: HP:0000718
label: Aggressive behavior
evidence:
- reference: DOI:10.1007/s10578-022-01367-y
reference_title: "The Efficacy of Parent Management Training With or Without Involving the Child in the Treatment Among Children with Clinical Levels of Disruptive Behavior: A Meta-analysis"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Results showed that PMT (g = 0.64 [95% CI 0.42, 0.86]) and PCIT
(g = 1.22 [95% CI 0.75, 1.69]) were more effective than waiting-list
(WL) in reducing parent-rated disruptive behavior
explanation: >-
Meta-analysis supports PMT for disruptive behavior symptoms relevant to
conduct disorder.
- name: Parent-child interaction therapy
description: >-
Parent-child interaction therapy is a parent-child psychosocial treatment
with large waitlist-controlled effects in young children with disruptive
behavior.
treatment_term:
preferred_term: parent-child interaction therapy
term:
id: MAXO:0000077
label: behavioral counseling
target_phenotypes:
- preferred_term: Rule-violating behavior
- preferred_term: Aggressive behavior
term:
id: HP:0000718
label: Aggressive behavior
evidence:
- reference: DOI:10.1007/s10578-022-01367-y
reference_title: "The Efficacy of Parent Management Training With or Without Involving the Child in the Treatment Among Children with Clinical Levels of Disruptive Behavior: A Meta-analysis"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
PCIT versus WL had larger effects in reducing disruptive behavior than
PMT versus WL.
explanation: >-
Meta-analysis supports PCIT for disruptive behavior symptoms.
- name: Specialized modules for callous-unemotional traits
description: >-
Children with disruptive behavior disorders and callous-unemotional traits
can improve with treatment, but higher severity supports specialized
modules alongside parenting programs.
treatment_term:
preferred_term: specialized psychosocial treatment module
term:
id: MAXO:0000077
label: behavioral counseling
target_phenotypes:
- preferred_term: Rule-violating behavior
evidence:
- reference: DOI:10.1111/jcpp.13774
reference_title: "Treatment of childhood disruptive behavior disorders and\n <scp>callous‐unemotional</scp>\n traits: a systematic review and two multilevel\n <scp>meta‐analyses</scp>"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
DBD+CU children improve with treatment, but their greater DBD symptom
severity requires specialized treatment modules that could be implemented
alongside parenting programs.
explanation: >-
Meta-analysis supports treatment response and specialized-module needs in
DBD with CU traits.
- name: Ziprasidone pharmacotherapy for severe aggression
description: >-
Ziprasidone has been studied as adjunctive symptom-targeted pharmacotherapy
for severe conduct and disruptive behavior disorders in older children and
adolescents.
treatment_term:
preferred_term: Pharmacotherapy
term:
id: NCIT:C15986
label: Pharmacotherapy
therapeutic_agent:
- preferred_term: ziprasidone
term:
id: CHEBI:10119
label: ziprasidone
target_phenotypes:
- preferred_term: Aggressive behavior
term:
id: HP:0000718
label: Aggressive behavior
evidence:
- reference: clinicaltrials:NCT00676429
reference_title: Ziprasidone for Severe Conduct and Other Disruptive Behavior Disorders in Children and Adolescents - a Placebo Controlled, Randomized, Double Blind Clinical Trial
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
To investigate and compare the efficacy, safety and tolerability of
ziprasidone versus placebo in the treatment of conduct disorder (CD),
oppositional defiant disorder (ODD) and disruptive behavior disorder not
otherwise specified (DBD-NOS) of older children and adolescents in an
outpatient setting.
explanation: >-
ClinicalTrials.gov record documents a Phase II ziprasidone trial for CD
and related disruptive behavior disorders.
- name: Methylphenidate pharmacotherapy for aggression
description: >-
Psychostimulant therapy with methylphenidate can reduce aggression in youth
with conduct disorder, including when ADHD is absent, but should be used
judiciously with monitoring for adverse effects.
treatment_term:
preferred_term: Pharmacotherapy
term:
id: NCIT:C15986
label: Pharmacotherapy
therapeutic_agent:
- preferred_term: methylphenidate
term:
id: CHEBI:6887
label: methylphenidate
target_phenotypes:
- preferred_term: Aggressive behavior
term:
id: HP:0000718
label: Aggressive behavior
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
methylphenidate reduces aggression in youth with ADHD or with conduct
disorder, even in the absence of ADHD.
explanation: >-
NEJM review supports methylphenidate as symptom-targeted pharmacotherapy
for aggression in conduct disorder.
- name: Atypical antipsychotic pharmacotherapy for irritability and aggression
description: >-
Atypical antipsychotics such as risperidone and aripiprazole can reduce
irritability and aggression in children, with broader evidence in youth
conduct problems but limitations from metabolic, neurologic, and sedating
adverse effects.
treatment_term:
preferred_term: Pharmacotherapy
term:
id: NCIT:C15986
label: Pharmacotherapy
therapeutic_agent:
- preferred_term: risperidone
term:
id: CHEBI:8871
label: risperidone
- preferred_term: aripiprazole
term:
id: CHEBI:31236
label: aripiprazole
target_phenotypes:
- preferred_term: Aggressive behavior
term:
id: HP:0000718
label: Aggressive behavior
- preferred_term: Irritability
term:
id: HP:0000737
label: Irritability
evidence:
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
antipsychotic medications reduce irritability and aggression in children.
explanation: >-
NEJM review supports antipsychotic medication effects on irritability and
aggression.
- reference: PMID:25470696
reference_title: Conduct disorder and callous-unemotional traits in youth.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The Food and Drug Administration (FDA) has approved two medications,
risperidone and aripiprazole, for the treatment of irritability and
aggression in autism.
explanation: >-
NEJM review identifies risperidone and aripiprazole as the relevant
atypical antipsychotics for pediatric irritability and aggression.
clinical_trials:
- name: NCT00676429
phase: PHASE_II
status: COMPLETED
description: >-
Placebo-controlled randomized double-blind trial of ziprasidone for severe
conduct and other disruptive behavior disorders in older children and
adolescents.
target_phenotypes:
- preferred_term: Aggressive behavior
term:
id: HP:0000718
label: Aggressive behavior
evidence:
- reference: clinicaltrials:NCT00676429
reference_title: Ziprasidone for Severe Conduct and Other Disruptive Behavior Disorders in Children and Adolescents - a Placebo Controlled, Randomized, Double Blind Clinical Trial
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
To investigate and compare the efficacy, safety and tolerability of
ziprasidone versus placebo in the treatment of conduct disorder (CD),
oppositional defiant disorder (ODD) and disruptive behavior disorder not
otherwise specified (DBD-NOS) of older children and adolescents in an
outpatient setting.
explanation: >-
ClinicalTrials.gov record documents a completed ziprasidone trial for CD
and related disruptive behavior disorders.
- name: NCT02828969
phase: NOT_APPLICABLE
status: UNKNOWN
description: >-
Observational trajectory study of children and adolescents with disruptive
behavior admitted to pediatric and psychiatric emergency settings.
target_phenotypes:
- preferred_term: Rule-violating behavior
evidence:
- reference: clinicaltrials:NCT02828969
reference_title: Clinical Trajectory of Children and Adolescents With Disruptive Behavior Admitted to Pediatric and Psychiatric Emergencies.
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The Trajectories project is designed to describe children and adolescents
with disruptive behaviors, their care management and to follow their life
trajectory and psychiatric evolution after admission to emergency rooms.
explanation: >-
ClinicalTrials.gov record documents a clinical trajectory study in
disruptive behavior emergencies.
- name: NCT07091721
phase: NOT_APPLICABLE
status: RECRUITING
description: >-
Randomized controlled trial of mentalization-based support for aggressive
and violent behavior in young people referred to forensic child and
adolescent mental health services.
target_phenotypes:
- preferred_term: Aggressive behavior
term:
id: HP:0000718
label: Aggressive behavior
evidence:
- reference: clinicaltrials:NCT07091721
reference_title: "The Mentalization Intervention for Children and Adolescents (MICA) Study: A Randomised Controlled Trial of Support for Aggressive and Violent Behaviour Via Forensic Child and Adolescent Mental Health Services (FCAMHS)"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
This research involves doing a randomised controlled trial. This means
half the young people will get the usual support from FCAMHS, and half
will get the usual support plus the new support.
explanation: >-
ClinicalTrials.gov record documents a currently recruiting RCT for
aggressive and violent behavior support.
datasets:
- accession: DOI:10.1186/s13034-024-00710-6
title: "Recognition and management of children and adolescents with conduct disorder: a real-world data study from four western countries"
description: >-
Cross-sectional real-world healthcare data study comparing administrative
prevalence, comorbidity, psychopharmacological treatment, and
hospitalisation in youths with CD across Denmark, Germany, Norway, and the
USA.
organism:
preferred_term: Homo sapiens
term:
id: NCBITaxon:9606
label: Homo sapiens
conditions:
- conduct disorder
- psychiatric comorbidity
publication: DOI:10.1186/s13034-024-00710-6
evidence:
- reference: DOI:10.1186/s13034-024-00710-6
reference_title: "Recognition and management of children and adolescents with conduct disorder: a real-world data study from four western countries"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Cross-sectional observational study using healthcare data to identify
children and adolescents (aged 0–19 years) with an ICD-10 code for CD
within the calendar year 2018.
explanation: >-
The abstract describes the real-world dataset and age range.
findings:
- statement: Administrative CD prevalence varied 31-fold across countries, and psychiatric comorbidity ranged from 69.7% to 86.1%.
evidence:
- reference: DOI:10.1186/s13034-024-00710-6
reference_title: "Recognition and management of children and adolescents with conduct disorder: a real-world data study from four western countries"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
The prevalence of diagnosed CD differed 31-fold between countries:
0.1% (Denmark), 0.3% (Norway), 1.1% (USA) and 3.1% (Germany), with a
male/female ratio of 2.0–2.5:1.
explanation: >-
Captures the main cross-country prevalence finding.
- accession: DOI:10.1038/s41380-023-02383-7
title: "Examining intergenerational risk factors for conduct problems using polygenic scores in the Norwegian Mother, Father and Child Cohort Study"
description: >-
Genotyped mother-father-child trio analysis testing transmission and
genetic nurture effects on conduct problems at ages 8 and 14 in MoBa.
organism:
preferred_term: Homo sapiens
term:
id: NCBITaxon:9606
label: Homo sapiens
sample_count: 31290
conditions:
- conduct problems
publication: DOI:10.1038/s41380-023-02383-7
evidence:
- reference: DOI:10.1038/s41380-023-02383-7
reference_title: "Examining intergenerational risk factors for conduct problems using polygenic scores in the Norwegian Mother, Father and Child Cohort Study"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
We used 31,290 genotyped mother-father-child trios from the Norwegian
Mother, Father and Child Cohort Study (MoBa)
explanation: >-
The abstract provides the trio dataset size and source.
findings:
- statement: Genetic transmission effects were detected for most tested PGS at age 8 and several at age 14, while genetic nurture effects were not detected for the selected PGS.
evidence:
- reference: DOI:10.1038/s41380-023-02383-7
reference_title: "Examining intergenerational risk factors for conduct problems using polygenic scores in the Norwegian Mother, Father and Child Cohort Study"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Conversely, we did not find genetic nurture effects for conduct
problems using our selection of PGS.
explanation: >-
Captures the contrast between transmission and genetic-nurture effects.
- accession: DOI:10.1111/jcpp.13774
title: "Treatment of childhood disruptive behavior disorders and <scp>callous‐unemotional</scp> traits: a systematic review and two multilevel <scp>meta‐analyses</scp>"
description: >-
Systematic review and multilevel meta-analyses of treatments for childhood
disruptive behavior disorders with and without callous-unemotional traits.
organism:
preferred_term: Homo sapiens
term:
id: NCBITaxon:9606
label: Homo sapiens
sample_count: 9405
conditions:
- disruptive behavior disorder
- callous-unemotional traits
publication: DOI:10.1111/jcpp.13774
evidence:
- reference: DOI:10.1111/jcpp.13774
reference_title: "Treatment of childhood disruptive behavior disorders and\n <scp>callous‐unemotional</scp>\n traits: a systematic review and two multilevel\n <scp>meta‐analyses</scp>"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
Sixty studies with 9,405 participants were included
explanation: >-
The abstract reports the evidence base for the treatment meta-analyses.
findings:
- statement: Treatment reduced disruptive behavior symptoms in both DBD+CU and DBD-only children, but DBD+CU children had greater symptom severity.
evidence:
- reference: DOI:10.1111/jcpp.13774
reference_title: "Treatment of childhood disruptive behavior disorders and\n <scp>callous‐unemotional</scp>\n traits: a systematic review and two multilevel\n <scp>meta‐analyses</scp>"
supports: SUPPORT
evidence_source: HUMAN_CLINICAL
snippet: >-
treatment was associated with similar reductions in DBD symptoms for
DBD+CU ( SMD = 1.08, 95% CI = 0.45, 1.72) and DBD‐only ( SMD =
1.01, 95% CI = 0.38, 1.64).
explanation: >-
Captures the primary treatment-effect comparison by CU-trait status.
notes: >-
Pathophysiology entries are separated into polygenic transmission, aggression
genetics, persistent antisocial behavior, callous-unemotional trait severity,
biomarker limitations, and psychosocial intervention response so downstream
relationships remain granular.
Question: You are an expert researcher providing comprehensive, well-cited information.
Provide detailed information focusing on: 1. Key concepts and definitions with current understanding 2. Recent developments and latest research (prioritize 2023-2024 sources) 3. Current applications and real-world implementations 4. Expert opinions and analysis from authoritative sources 5. Relevant statistics and data from recent studies
Format as a comprehensive research report with proper citations. Include URLs and publication dates where available. Always prioritize recent, authoritative sources and provide specific citations for all major claims.
Please provide a comprehensive research report on Conduct Disorder covering all of the disease characteristics listed below. This report will be used to populate a disease knowledge base entry. Be thorough and cite primary literature (PMID preferred) for all claims.
For each section, suggested databases/resources are listed. These are the first places you should search for information on each topic.
Search first: OMIM, Orphanet, ICD-10/ICD-11, MeSH, PubMed
Search first: PubMed, Cochrane Library, UpToDate, clinical guidelines, ClinVar, ClinGen, GWAS Catalog, PheGenI, CTD, CDC, WHO, epidemiological databases
Search first: PubMed, Cochrane Library, clinical trial databases, GWAS Catalog, gnomAD, WHO, CDC, nutrition databases
Search first: CTD, PubMed, PheGenI, GxE databases
Search first: HPO (Human Phenotype Ontology), OMIM, Orphanet, PubMed, clinicaltrials.gov, MedDRA, SNOMED CT, DECIPHER, LOINC
For each phenotype, provide: - Phenotype type: symptoms, clinical signs, physical manifestations, behavioral changes, or laboratory abnormalities
For symptoms/signs: HPO, OMIM, Orphanet, PubMed For behavioral changes: HPO, DSM, RDoC (Research Domain Criteria), PubMed For laboratory abnormalities: LOINC, SNOMED CT, LabTests Online, PubMed - Phenotype characteristics: Search first: OMIM, Orphanet, HPO, PubMed - Age of symptom onset (neonatal, childhood, adult-onset, late-onset) - Symptom severity (mild, moderate, severe, variable) - Symptom progression (stable, progressive, episodic, fluctuating) - Frequency among affected individuals (percentage or qualitative) - Quality of life impact: Effects on daily functioning and well-being (per-phenotype when possible) Search first: EQ-5D database, SF-36, WHO QOL databases, PubMed - Suggest HPO (Human Phenotype Ontology) terms for each phenotype
Search first: OMIM, ClinVar, HGMD, Ensembl, NCBI Gene
Search first: ENCODE, Roadmap Epigenomics, MethBase, DiseaseMeth
Search first: DECIPHER, ClinVar, ECARUCA, UCSC Genome Browser
Search first: CTD (Comparative Toxicogenomics Database), TOXNET, PubMed, EPA databases
Search first: CDC databases, WHO, PubMed, NHANES
Search first: NCBI Taxonomy, ViPR, BV-BRC, MicrobeDB, GIDEON
Search first: KEGG, Reactome, WikiPathways, PathBank, BioCyc
Search first: Gene Ontology (GO), Reactome, KEGG, PubMed
Search first: UniProt, PDB (Protein Data Bank), InterPro, Pfam, AlphaFold
Search first: KEGG, BioCyc, HMDB (Human Metabolome Database), BRENDA
Search first: ImmPort, Immunome Database, IEDB, Gene Ontology
Search first: PubMed, Gene Ontology, Reactome
Search first: BRENDA, UniProt, KEGG, OMIM, PubMed
Search first: ENCODE, Roadmap Epigenomics, MethBase, DiseaseMeth
For each mechanism, describe: - The causal chain from initial trigger to clinical manifestation - Which mechanisms are upstream vs downstream - What cell types and biological processes are involved - Suggest GO terms for biological processes and CL terms for cell types
Search first: Uberon, FMA (Foundational Model of Anatomy), OMIM, HPO, ICD-11, MeSH, SNOMED CT
Search first: Uberon, Human Protein Atlas, Cell Ontology, Human Cell Atlas, CellMarker, PanglaoDB
Search first: Gene Ontology (Cellular Component), UniProt, Human Protein Atlas
Search first: OMIM, Orphanet, HPO, PubMed
Search first: Disease registries, longitudinal cohort databases, natural history studies, PubMed, Orphanet, OMIM
Search first: Orphanet, CDC, WHO, GBD (Global Burden of Disease), national registries, SEER, disease registries
Search first: GTR (Genetic Testing Registry), GeneReviews, ClinGen
For each treatment, suggest MAXO (Medical Action Ontology) terms where applicable.
Search first: CDC vaccine schedules, WHO immunization, FDA vaccine database
Search first: CDC, WHO, behavioral intervention databases, Cochrane Library
Search first: NSGC resources, ACMG guidelines, GeneReviews
Search first: Clinical guidelines, FDA approvals, PubMed
Search first: NCBI Taxonomy
Search first: VBO (Vertebrate Breed Ontology)
Search first: NCBI Gene
Structure your response as a comprehensive narrative organized by the sections above. For each section, provide: - Factual content with specific details (numbers, percentages, gene names, variant nomenclature) - Ontology term suggestions (HPO, GO, CL, UBERON, CHEBI, MAXO, MONDO) where applicable - Evidence citations with PMIDs - Direct quotes from abstracts to support key claims - Clear indication when information is not available or not applicable for this disease
This report will be used to populate a disease knowledge base entry with: - Pathophysiology descriptions with causal chains - Gene/protein annotations (HGNC, GO terms) - Phenotype associations (HP terms) with frequencies - Cell type involvement (CL terms) - Anatomical locations (UBERON terms) - Chemical entities (CHEBI terms) - Treatment annotations (MAXO terms) - Evidence items with PMIDs and exact abstract quotes - Epidemiology, prognosis, diagnostic, and prevention information - Animal model descriptions with phenotype recapitulation details
Conduct disorder is a childhood/adolescent-onset psychiatric disorder defined by a persistent pattern of behaviors violating the rights of others and major societal norms/rules, spanning aggression, property destruction, deceit/theft, and serious rule violations (masi2023contemporarydiagnosisand pages 1-5, ruotsalainen2022childhoodpsychopathyin pages 38-43). Modern classification emphasizes clinically meaningful heterogeneity via specifiers for age of onset and limited prosocial emotions (LPE)/callous-unemotional (CU) traits, which are associated with more severe antisocial trajectories and may moderate treatment response (masi2023contemporarydiagnosisand pages 5-7, masi2023contemporarydiagnosisand pages 1-5). Current evidence supports psychosocial interventions as first-line, especially parenting and family-involving approaches; medication is adjunctive and symptom-targeted (e.g., severe aggression, comorbid ADHD), with limited disorder-specific evidence (masi2023contemporarydiagnosisand pages 17-20, masi2023contemporarydiagnosisand pages 28-30).
| Item | Key details | Best supporting source (author year) | URL | Evidence citation ID |
|---|---|---|---|---|
| Nosology / identifiers | DSM-5/DSM-5-TR: Conduct Disorder (CD), in the chapter Disruptive, Impulse-Control, and Conduct Disorders. ICD-11: Conduct-dissocial disorder code 6C91, under disruptive behaviour/dissocial disorders. ICD-11 explicitly separates ODD and conduct-dissocial disorder and uses a lifespan approach. | Masi et al. 2023; Reed et al. 2019 | https://doi.org/10.1080/14737175.2023.2271169 ; https://doi.org/10.1002/wps.20611 | (masi2023contemporarydiagnosisand pages 1-5, ruotsalainen2022childhoodpsychopathyin pages 18-21) |
| Core diagnostic domains / criteria summary | DSM framework: persistent, repetitive violation of others’ rights and age-appropriate norms; 15 criteria across 4 domains: aggression to people/animals, destruction of property, deceitfulness/theft, serious rule violations. Diagnosis requires ≥3 criteria in 12 months and ≥1 in past 6 months, with clinically significant impairment. | Masi et al. 2023; Ruotsalainen 2022 | https://doi.org/10.1080/14737175.2023.2271169 | (masi2023contemporarydiagnosisand pages 1-5, ruotsalainen2022childhoodpsychopathyin pages 38-43) |
| ICD-11 diagnostic structure | ICD-11 conduct-dissocial disorder uses similar 4 behavioural groupings; evidence summarized in recent review notes ICD-11 requires a persistent pattern over at least 12 months and includes affective/interpersonal qualifiers. | Özbay et al. 2024 | https://doi.org/10.18863/pgy.1331287 | (ozbay2024conductdisorderan pages 5-7) |
| Age-of-onset specifiers | Childhood-onset: at least 1 symptom before age 10. Adolescent-onset: no symptoms before age 10. Childhood-onset is linked to earlier onset, greater severity, neurobiological vulnerability, and worse long-term outcomes than later-onset presentations. | Masi et al. 2023 | https://doi.org/10.1080/14737175.2023.2271169 | (masi2023contemporarydiagnosisand pages 5-7, masi2023contemporarydiagnosisand pages 1-5) |
| Limited prosocial emotions / callous-unemotional specifier | DSM-5 with Limited Prosocial Emotions (LPE) / CU traits: at least 2 of 4 traits for 12 months across settings: lack of remorse/guilt, callous-lack of empathy, unconcern about performance, shallow/deficient affect. Associated with more severe antisocial behaviour and poorer prognosis/treatment response. | Masi et al. 2023 | https://doi.org/10.1080/14737175.2023.2271169 | (masi2023contemporarydiagnosisand pages 5-7, ruotsalainen2022childhoodpsychopathyin pages 38-43) |
| ICD-11 LPE-related qualifier | ICD-11 includes an LPE-related qualifier and, compared with DSM-5, adds an indicator related to indifference to punishment; recent summaries note qualifier use in conduct-dissocial disorder and ODD. | Masi et al. 2023; Ruotsalainen 2022 | https://doi.org/10.1080/14737175.2023.2271169 | (masi2023contemporarydiagnosisand pages 5-7, ruotsalainen2022childhoodpsychopathyin pages 47-48) |
| Recent epidemiology: community prevalence | Recent reviews cite global prevalence ~1.5% and broader community estimates often 2–4%; a recent European estimate reported 1.5% overall, 1.8% in males, 1.0% in females. | Masi et al. 2023; Özbay et al. 2024; Bachmann et al. 2024 | https://doi.org/10.1080/14737175.2023.2271169 ; https://doi.org/10.18863/pgy.1331287 ; https://doi.org/10.1186/s13034-024-00710-6 | (masi2023contemporarydiagnosisand pages 1-5, ozbay2024conductdisorderan pages 7-8) |
| Sex ratio / demographic pattern | Boys show roughly 2:1 higher prevalence than girls; recent real-world cross-country study found male:female ratio 2.0–2.5:1 for diagnosed CD. Boys more often show physical aggression/property damage; girls more often serious rule violations/relational aggression. | Bachmann et al. 2024; Masi et al. 2023 | https://doi.org/10.1186/s13034-024-00710-6 ; https://doi.org/10.1080/14737175.2023.2271169 | (masi2023contemporarydiagnosisand pages 1-5) |
| Real-world administrative prevalence variation | Among youths aged 0–19 years in 2018 health-system data, diagnosed CD prevalence differed 31-fold across countries: 0.1% Denmark, 0.3% Norway, 1.1% USA, 3.1% Germany; comorbidity was high (69.7–86.1%), ADHD most common. | Bachmann et al. 2024 | https://doi.org/10.1186/s13034-024-00710-6 | (masi2023contemporarydiagnosisand pages 1-5) |
| Psychosocial treatment meta-analysis (adolescents) | 2023 meta-analysis of 17 RCTs / 1,954 adolescents found psychosocial treatments had a large short-term effect on externalizing symptoms (SMD ≈ 0.98 in magnitude at endpoint), but benefit did not persist at follow-up; family-format interventions were most effective. | Boldrini et al. 2023 | https://doi.org/10.1016/j.jaac.2022.05.002 | (boldrini2023systematicreviewand pages 6-9, boldrini2023systematicreviewand pages 16-19) |
| Parent Management Training (PMT) | 2024 meta-analysis of 25 RCTs in children with clinical disruptive behaviour found PMT vs waiting list: g = 0.64 (95% CI 0.42–0.86) for reducing parent-rated disruptive behaviour; PMT also improved parental skills (g = 0.83) and child social skills (g = 0.49). | Helander et al. 2024 | https://doi.org/10.1007/s10578-022-01367-y | (helander2024theefficacyof pages 1-2) |
| Parent–Child Interaction Therapy (PCIT) | Same 2024 meta-analysis found PCIT vs waiting list: g = 1.22 (95% CI 0.75–1.69), larger than PMT for younger children with disruptive behaviour. | Helander et al. 2024 | https://doi.org/10.1007/s10578-022-01367-y | (helander2024theefficacyof pages 1-2) |
| PMT + child CBT | In the limited available studies, adding child-directed CBT to PMT did not show added benefit over PMT alone. | Helander et al. 2024 | https://doi.org/10.1007/s10578-022-01367-y | (helander2024theefficacyof pages 1-2) |
| DBD with CU/LPE traits treatment response | 2023 multilevel meta-analysis of 60 studies / 9,405 participants: treatment reduced DBD symptoms similarly in DBD+CU (SMD = 1.08) and DBD-only (SMD = 1.01), but CU/LPE youths started and ended treatment with more severe symptoms; parenting-focused components showed small direct reductions in CU traits (SMD = 0.21). | Perlstein et al. 2023 | https://doi.org/10.1111/jcpp.13774 | (perlstein2023treatmentofchildhood pages 1-3, perlstein2023treatmentofchildhood pages 11-12) |
| Functional Family Therapy (FFT) evidence | 2023 Campbell review: 20 studies (15 meta-analyzable; 10,980 families). Pairwise meta-analysis found no clear evidence of benefit of FFT over active comparators on primary outcomes; overall correlated-effects estimate SMD = 0.19, SE = 0.09, not significantly different from zero; certainty very low. | Littell et al. 2023 | https://doi.org/10.1002/cl2.1324 | (littell2023functionalfamilytherapy pages 1-2) |
| Treatment hierarchy / implementation takeaway | Expert reviews recommend psychosocial interventions first-line; medications are adjunctive, symptom-targeted (e.g., severe aggression, emotional dysregulation, comorbid ADHD), not disease-specific first-line therapy. | Masi et al. 2023 | https://doi.org/10.1080/14737175.2023.2271169 | (masi2023contemporarydiagnosisand pages 17-20, masi2023contemporarydiagnosisand pages 1-5, masi2023contemporarydiagnosisand pages 28-30) |
Table: This table summarizes core nosology, diagnostic structure, specifiers, epidemiology, and treatment-effect evidence for Conduct Disorder / ICD-11 conduct-dissocial disorder. It is designed as a compact knowledge-base artifact with direct links and context-ID citations for rapid reuse.
Conduct disorder (CD) is characterized by “persistent, repetitive behaviors that violate societal norms and others’ rights” (reviewed in contemporary clinical synthesis) (masi2023contemporarydiagnosisand pages 1-5). DSM-5-TR places CD within Disruptive, Impulse-Control, and Conduct Disorders (masi2023contemporarydiagnosisand pages 1-5).
Core symptom domains (DSM framing): - Aggression toward people/animals - Destruction of property - Deceitfulness or theft - Serious violations of rules (masi2023contemporarydiagnosisand pages 1-5, ruotsalainen2022childhoodpsychopathyin pages 38-43)
DSM-5 diagnostic threshold (summary): ≥3 of 15 criteria in the past 12 months, with ≥1 present in the last 6 months, plus clinically significant impairment (ruotsalainen2022childhoodpsychopathyin pages 38-43, ozbay2024conductdisorderan pages 2-3).
This report is derived from aggregated disease-level resources (systematic reviews, meta-analyses, expert reviews) and selected primary clinical/epidemiologic studies (e.g., administrative prevalence comparisons; cohort/AI prediction studies) (boldrini2023systematicreviewand pages 6-9, helander2024theefficacyof pages 1-2, lacy2023selectivelypredictingthe pages 1-2).
Recent expert synthesis emphasizes CD as etiologically heterogeneous and multifactorial, involving genetic, individual neurodevelopmental, and psychosocial factors (masi2023contemporarydiagnosisand pages 1-5).
Childhood aggression (closely related to conduct problems/CD phenotypes) is consistently reported as substantially heritable in modern synthesis. - Abstract quote: “While half of the variance in childhood aggression is attributed to genetic factors…” (Koyama et al., 2024) (koyama2024geneticsofchild pages 1-2). - Candidate gene literature has historically focused on monoaminergic and catecholaminergic genes such as MAOA, DRD4, COMT, though conclusions are often inconsistent due to sample size and phenotyping heterogeneity (koyama2024geneticsofchild pages 3-4, koyama2024geneticsofchild pages 1-2).
Polygenic score (PGS) transmission evidence (parent–child trios): - Abstract quote: “We found significant genetic transmission effects on conduct problems for 12 out of 13 PGS at age 8 years (strongest association: PGS for smoking, β = 0.07…) … Conversely, we did not find genetic nurture effects…” (Frach et al., 2024; MoBa trios n=31,290) (frach2024examiningintergenerationalrisk pages 1-2).
A recent update review summarizes evidence that exposure to social violence is associated with markedly increased likelihood of CD (e.g., “two- and four-fold” increased likelihood for witnessing vs being a victim) (ozbay2024conductdisorderan pages 7-8). Although this is not a mechanistic causal claim, it supports violence exposure as a prominent risk correlate.
A Mendelian randomization study testing low resting heart rate (RHR) as a potential causal risk factor for antisocial behavior (ASB; related to CD spectrum) found no evidence of a causal association, indicating some observed physiological associations may reflect confounding. - Abstract quote: “No causal association was observed between RHR and ASB…” and “previously observed associations… may arise from confounding…” (Karwatowska et al., 2023) (masi2023contemporarydiagnosisand pages 5-7).
Direct protective-factor estimates specific to CD were not available from the retrieved sources. However, in intergenerational genetic work, PGS for educational attainment were negatively associated with conduct problems, consistent with a broader protective correlation pattern (frach2024examiningintergenerationalrisk pages 6-7).
Modern genetic synthesis of childhood aggression notes the field increasingly studies GxE and reports examples (e.g., genetic effects moderated by parenting/social feedback, maltreatment-linked moderation in stress-response genes), but emphasizes inconsistent findings due to methodological heterogeneity (koyama2024geneticsofchild pages 23-24, koyama2024geneticsofchild pages 3-4).
Phenotypes correspond to the DSM domains above (aggression; property destruction; deceit/theft; serious rule violations) (masi2023contemporarydiagnosisand pages 1-5, ruotsalainen2022childhoodpsychopathyin pages 38-43).
Suggested HPO term mappings (proposed; approximate): - Aggressive behavior (HP:0000718; “Aggression”) — maps to aggression domain. - Antisocial behavior (HP:0031932; if available in current HPO versions) — maps to rights/norm violations. - Impulsivity (HP:0000737) — commonly comorbid/related externalizing dimension. - Deceitful behavior / pathological lying (HPO term availability varies; may map via broader “Abnormal social behavior” HP:0000730).
(Note: HPO term IDs are suggested mappings for knowledge-base normalization; they were not extracted from the cited papers.)
DSM subtyping includes: - Childhood-onset: ≥1 symptom before age 10. - Adolescent-onset: symptoms begin after age 10. (masi2023contemporarydiagnosisand pages 1-5)
Childhood-onset presentations are described as associated with earlier onset, greater severity, and worse long-term outcomes (including substance abuse and criminality) in expert synthesis (masi2023contemporarydiagnosisand pages 5-7).
DSM-5 LPE specifier criteria (summary): at least 2 of 4 features for 12 months across relationships/settings—lack of remorse/guilt, callousness/lack of empathy, unconcern about performance, shallow/deficient affect (masi2023contemporarydiagnosisand pages 5-7, ruotsalainen2022childhoodpsychopathyin pages 38-43).
Abstract-linked context from expert review: the specifier aims to identify a developmental trajectory toward adult antisocial outcomes (masi2023contemporarydiagnosisand pages 5-7).
Longitudinal prognosis relevance (2023): A 10-year prospective study in residential care reported that LPE is associated with future offending, with dimensional LPE score retaining association with violent offending after adjustment for prior violent offending. - Abstract quote: “the dimensional LPE score was associated with both future general and violent offending… [and] remained significant even after controlling for gender, age, and prior violent offending.” (Boonmann et al., 2023) (masi2023contemporarydiagnosisand pages 5-7).
High psychiatric comorbidity is typical in health-system cohorts. - A cross-country administrative study reported comorbidity rates 69.7–86.1%, with ADHD most common (Bachmann et al., 2024 abstract) (masi2023contemporarydiagnosisand pages 5-7).
Conduct disorder is not a Mendelian disorder; no single causal gene is established. Available evidence supports polygenic and multifactorial architecture (frach2024examiningintergenerationalrisk pages 1-2, koyama2024geneticsofchild pages 1-2).
A recent systematic review of childhood aggression genetics (often used as an etiologic window into CD-spectrum behaviors) reports dominance of candidate gene research, particularly: - MAOA (17 studies) - DRD4 (13 studies) - COMT (12 studies) (koyama2024geneticsofchild pages 1-2)
However, the same review emphasizes inconsistent results and methodological limitations (moderate sample sizes, heterogeneous phenotyping) (koyama2024geneticsofchild pages 1-2).
Intergenerational trio analyses show measurable transmission effects across multiple parental-trait PGS with conduct problems at ages 8 and 14, with limited evidence of genetic nurture in the tested PGS set (frach2024examiningintergenerationalrisk pages 1-2).
Epigenetic and transcriptomic approaches are described as increasing in frequency in aggression genetics research, but no specific replicated biomarkers for CD were identified in the retrieved evidence (koyama2024geneticsofchild pages 1-2).
Direct toxin/pathogen associations were not identified in the retrieved sources. The strongest available environmental evidence in this run pertains to violence exposure as a risk correlate and to broader psychosocial determinants highlighted in predictive modeling work (ozbay2024conductdisorderan pages 7-8, lacy2023selectivelypredictingthe pages 1-2).
Expert synthesis links CD/CU phenotypes to dysfunction in systems supporting empathy and social learning. - Altered amygdala responses and dysfunction in other regions involved in empathy/social learning are described in fMRI literature; CU traits show reduced recognition/response to emotional stimuli across behavioral and physiological measures (masi2023contemporarydiagnosisand pages 7-10).
Causal chain (conceptual): early neurodevelopmental and environmental risks → atypical emotional learning/empathy and/or threat processing (e.g., amygdala-related processing) → persistent antisocial rule-violating behavior patterns; CU/LPE traits represent a subgroup with diminished prosocial emotional processing and more stable/severe antisocial trajectories (masi2023contemporarydiagnosisand pages 5-7, masi2023contemporarydiagnosisand pages 7-10).
Reactive aggression is described as associated with physiological overarousal and poor emotion regulation (masi2023contemporarydiagnosisand pages 7-10).
A high-authority World Psychiatry systematic review assessed candidate diagnostic biomarkers (biochemical, neuroimaging, neurophysiological, etc.) across pediatric neurodevelopmental disorders and reported no biomarker meeting replication criteria of ≥80% sensitivity and specificity in ≥2 independent studies (cortese2023candidatediagnosticbiomarkers pages 1-2). - Abstract quote: “we could not find any biomarker for which there was evidence… of specificity and sensitivity of at least 80%.” (Cortese et al., 2023) (cortese2023candidatediagnosticbiomarkers pages 1-2).
For conduct disorder/externalizing biomarker evidence specifically, the same review found only limited cross-sectional evidence with poor replication. - “Only a single study achieved sensitivity and specificity ≥80%… There were no biomarkers for which sensitivity, specificity, PPV, NPV and ROC AUC had been evaluated in more than one study…” (Cortese et al., 2023) (cortese2023candidatediagnosticbiomarkers pages 12-13).
Implication: at present, biomarkers are not ready for routine CD diagnosis; research-grade predictive modeling exists but requires external validation and implementation studies.
A 2023 ABCD-based study used deep learning to predict future onset of CD/ODD/ADHD over 2 years using multimodal features including neuroimaging, physiology, and psychosocial measures. - Abstract quote: “Multimodal models achieved ~86–97% accuracy, 0.919–0.996 AUROC…” (de Lacy & Ramshaw, 2023) (lacy2023selectivelypredictingthe pages 1-2). This suggests potential for risk prediction, but the authors emphasize the need for external validation and generalizability assessment (lacy2023selectivelypredictingthe pages 1-2).
Suggested GO biological process terms (conceptual mapping): - Social behavior (GO:0035176) - Regulation of emotional behavior (GO:0046834) - Learning (GO:0007612)
Suggested Cell Ontology / UBERON mappings (conceptual): - Amygdala (UBERON:0001876) - Prefrontal cortex (UBERON:0000451) - Neurons (CL:0000540) - Microglia (CL:0000129) (note: microglia were not specifically evidenced for CD in retrieved sources; included only as a general CNS immune cell type)
Primary involvement is neuropsychiatric/behavioral, implicating brain circuits for emotion regulation, empathy, and reward/threat learning. - Evidence emphasizes amygdala and broader networks supporting empathy and social learning in CD/CU traits (masi2023contemporarydiagnosisand pages 7-10).
Suggested UBERON structures (conceptual mapping): - Amygdala (UBERON:0001876) - Prefrontal cortex (UBERON:0000451)
CD onset is typically during school years or early adolescence; DSM-5 uses onset before vs after age 10 for subtype specification (masi2023contemporarydiagnosisand pages 1-5).
Expert synthesis describes developmental shifts: aggressive behaviors tend to decline with age, while non-aggressive rule violations increase in adolescence (masi2023contemporarydiagnosisand pages 1-5).
The frequent developmental sequence from ODD to CD, with CD sometimes emerging before school age, supports early prevention and early treatment as critical (masi2023contemporarydiagnosisand pages 5-7).
Recent expert review and update articles report community prevalence in the low single-digit percentages. - Global prevalence around ~1.5% (expert review summary) (masi2023contemporarydiagnosisand pages 1-5). - Recent European estimate summarized as 1.5% overall; 1.8% males; 1.0% females (secondary review citing Sacco et al. 2021) (ozbay2024conductdisorderan pages 7-8).
Male prevalence is consistently higher than female prevalence, approximately ~2:1 in multiple sources. - Boys 3–4% vs girls 0.5–1% cited in expert synthesis (masi2023contemporarydiagnosisand pages 1-5).
A 2024 real-world data study compared 2018 health-system data across Denmark, Norway, USA, and Germany. - Abstract quote (prevalence): “The prevalence of diagnosed CD differed 31-fold between countries: 0.1% (Denmark), 0.3% (Norway), 1.1% (USA) and 3.1% (Germany)…” (Bachmann et al., 2024) (masi2023contemporarydiagnosisand pages 5-7). - Abstract quote (sex ratio): “…with a male/female ratio of 2.0–2.5:1.” (Bachmann et al., 2024) (masi2023contemporarydiagnosisand pages 5-7).
Diagnosis relies on clinical/behavioral criteria (no validated diagnostic biomarker). - DSM-5 criteria are organized across four behavioral domains; diagnosis requires persistence and impairment (ruotsalainen2022childhoodpsychopathyin pages 38-43, ozbay2024conductdisorderan pages 2-3).
ICD-11 uses conduct-dissocial disorder (6C91) with similar behavioral groupings and an emphasized duration threshold (secondary summary indicates 12 months vs 6 months in ICD-10) (ozbay2024conductdisorderan pages 5-7).
High comorbidity with ADHD is common; comorbidity complicates specificity of candidate biomarkers and requires careful clinical assessment (cortese2023candidatediagnosticbiomarkers pages 2-3).
Not clinically established. - Abstract quote: no biomarker met pre-specified replication standards (Cortese et al., 2023) (cortese2023candidatediagnosticbiomarkers pages 1-2).
Childhood-onset CD and CU/LPE traits are linked to worse longitudinal outcomes in expert synthesis (e.g., persistence, severity, antisocial trajectory) (masi2023contemporarydiagnosisand pages 5-7).
Longitudinal evidence supports LPE/CU traits as relevant to future offending risk, but effect sizes are influenced by static risk factors (gender, prior offending). - Abstract quote: “This relationship… should not be overestimated, as there are other (static) factors (e.g. gender and prior offending behavior)…” (Boonmann et al., 2023) (masi2023contemporarydiagnosisand pages 5-7).
The best-supported treatments are psychosocial, especially parenting and family-involving interventions.
Adolescents (psychosocial treatments): - A 2023 systematic review/meta-analysis (17 RCTs; n=1,954) found short-term improvement in disruptive/externalizing outcomes, with limited durability at follow-up. - Abstract/summary evidence: large endpoint effects and family-format interventions most effective; effects did not persist at follow-up (boldrini2023systematicreviewand pages 6-9).
Children (parent-focused treatments): - Parent Management Training (PMT) and Parent–Child Interaction Therapy (PCIT) show moderate-to-large effects vs waitlist. - Abstract quote: “PMT (g = 0.64…) and PCIT (g = 1.22…) were more effective than waiting-list…” (Helander et al., 2024) (helander2024theefficacyof pages 1-2).
DBD with CU/LPE traits: - Abstract quote: “Treatment was associated with similar reductions in DBD symptoms for DBD+CU (SMD = 1.08…) and DBD-only (SMD = 1.01…)… [but] no overall direct effect… on CU traits (SMD = .09…).” (Perlstein et al., 2023) (perlstein2023treatmentofchildhood pages 1-3).
MAXO suggestions (treatment actions; conceptual mapping): - Behavioral parent training / parenting intervention (MAXO: behavioral therapy / parent training; exact MAXO IDs not retrieved) - Family therapy (FFT/MST modalities) - Cognitive behavioral therapy (CBT) modules for anger, problem-solving, emotion regulation
Real-world administrative data show substantial between-country variation and notable psychopharmacology use. - Abstract quote: “Between 4.0% (Germany) and 12.2% (USA) of youths with a CD diagnosis were prescribed antipsychotic medication…” (Bachmann et al., 2024) (masi2023contemporarydiagnosisand pages 5-7).
Contemporary expert reviews emphasize medications are not first-line for CD itself, but can target severe aggression, irritability, emotional dysregulation, or comorbid ADHD. - “psychosocial… interventions are the primary (first-line) treatments… Pharmacological treatments are considered adjunctive and targeted” (masi2023contemporarydiagnosisand pages 25-28). - Limited licensing: risperidone has a narrow indication for short-term persistent aggression in DBD with intellectual disability (masi2023contemporarydiagnosisand pages 17-20).
Medication classes commonly discussed for target symptoms: - Stimulants when ADHD is comorbid; meta-analytic evidence indicates stimulants reduce pediatric aggression (masi2023contemporarydiagnosisand pages 22-25). - Second-generation antipsychotics (notably risperidone; also aripiprazole/olanzapine/quetiapine) for severe aggression; metabolic risks require monitoring and time-limited use (masi2023contemporarydiagnosisand pages 28-30, masi2023contemporarydiagnosisand pages 50-52). - Mood stabilizers (e.g., lithium; divalproex) for aggression/emotional dysregulation with modest average effects (masi2023contemporarydiagnosisand pages 22-25).
MAXO suggestions (pharmacologic actions; conceptual mapping): - Antipsychotic therapy - Psychostimulant therapy - Mood stabilizer therapy
Evidence specific to CD prevention programs was not comprehensively retrieved in this run; however, the etiologic and course evidence indicates early intervention is important because CD may follow ODD and can emerge before school age (masi2023contemporarydiagnosisand pages 5-7).
Clinical trial registry entries retrieved include prevention-oriented and stepped-care behavioral interventions for conduct problems (not cited here because corresponding trial text evidence was not gathered in this run).
No primary comparative psychiatry evidence for conduct disorder analogs in other species was retrieved in this run.
No conduct-disorder-specific model organism paper was retrieved in this run. Genetic and neurobiological syntheses emphasize that translational progress may benefit from diverse methods (including longitudinal and multi-omics approaches), but specific animal model evidence was not captured in the retrieved sources (koyama2024geneticsofchild pages 1-2).
A major recent expert review stresses that CD is heterogeneous and that careful subtyping (age of onset, CU/LPE traits, emotional dysregulation, comorbidity) is crucial for prognosis and treatment selection (masi2023contemporarydiagnosisand pages 1-5). The same synthesis emphasizes a stepped-care logic: psychosocial interventions first; medications only when necessary to target specific severe dimensions (aggression/ADHD/emotional reactivity) and with cautious monitoring given limited evidence quality and adverse-effect risks (masi2023contemporarydiagnosisand pages 17-20, masi2023contemporarydiagnosisand pages 28-30).
References
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(koyama2024geneticsofchild pages 1-2): Emiko Koyama, Tuana Kant, Atsushi Takata, James L. Kennedy, and Clement C. Zai. Genetics of child aggression, a systematic review. Translational Psychiatry, Jun 2024. URL: https://doi.org/10.1038/s41398-024-02870-7, doi:10.1038/s41398-024-02870-7. This article has 50 citations and is from a peer-reviewed journal.
(koyama2024geneticsofchild pages 3-4): Emiko Koyama, Tuana Kant, Atsushi Takata, James L. Kennedy, and Clement C. Zai. Genetics of child aggression, a systematic review. Translational Psychiatry, Jun 2024. URL: https://doi.org/10.1038/s41398-024-02870-7, doi:10.1038/s41398-024-02870-7. This article has 50 citations and is from a peer-reviewed journal.
(frach2024examiningintergenerationalrisk pages 1-2): Leonard Frach, Wikus Barkhuizen, Andrea G. Allegrini, Helga Ask, Laurie J. Hannigan, Elizabeth C. Corfield, Ole A. Andreassen, Frank Dudbridge, Eivind Ystrom, Alexandra Havdahl, and Jean-Baptiste Pingault. Examining intergenerational risk factors for conduct problems using polygenic scores in the norwegian mother, father and child cohort study. Molecular Psychiatry, 29:951-961, Jan 2024. URL: https://doi.org/10.1038/s41380-023-02383-7, doi:10.1038/s41380-023-02383-7. This article has 24 citations and is from a highest quality peer-reviewed journal.
(frach2024examiningintergenerationalrisk pages 6-7): Leonard Frach, Wikus Barkhuizen, Andrea G. Allegrini, Helga Ask, Laurie J. Hannigan, Elizabeth C. Corfield, Ole A. Andreassen, Frank Dudbridge, Eivind Ystrom, Alexandra Havdahl, and Jean-Baptiste Pingault. Examining intergenerational risk factors for conduct problems using polygenic scores in the norwegian mother, father and child cohort study. Molecular Psychiatry, 29:951-961, Jan 2024. URL: https://doi.org/10.1038/s41380-023-02383-7, doi:10.1038/s41380-023-02383-7. This article has 24 citations and is from a highest quality peer-reviewed journal.
(koyama2024geneticsofchild pages 23-24): Emiko Koyama, Tuana Kant, Atsushi Takata, James L. Kennedy, and Clement C. Zai. Genetics of child aggression, a systematic review. Translational Psychiatry, Jun 2024. URL: https://doi.org/10.1038/s41398-024-02870-7, doi:10.1038/s41398-024-02870-7. This article has 50 citations and is from a peer-reviewed journal.
(masi2023contemporarydiagnosisand pages 7-10): Gabriele Masi, Sara Carucci, Pietro Muratori, Carla Balia, Gianluca Sesso, and Annarita Milone. Contemporary diagnosis and treatment of conduct disorder in youth. Expert Review of Neurotherapeutics, 23:1277-1296, Oct 2023. URL: https://doi.org/10.1080/14737175.2023.2271169, doi:10.1080/14737175.2023.2271169. This article has 8 citations and is from a peer-reviewed journal.
(cortese2023candidatediagnosticbiomarkers pages 1-2): Samuele Cortese, Marco Solmi, Giorgia Michelini, Alessio Bellato, Christina Blanner, Andrea Canozzi, Luis Eudave, Luis C. Farhat, Mikkel Højlund, Ole Köhler‐Forsberg, Douglas Teixeira Leffa, Christopher Rohde, Gonzalo Salazar de Pablo, Giovanni Vita, Rikke Wesselhoeft, Joanna Martin, Sarah Baumeister, Natali S. Bozhilova, Christina O. Carlisi, Virginia Carter Leno, Dorothea L. Floris, Nathalie E. Holz, Eline J. Kraaijenvanger, Seda Sacu, Isabella Vainieri, Giovanni Ostuzzi, Corrado Barbui, and Christoph U. Correll. Candidate diagnostic biomarkers for neurodevelopmental disorders in children and adolescents: a systematic review. World Psychiatry, 22:129-149, Jan 2023. URL: https://doi.org/10.1002/wps.21037, doi:10.1002/wps.21037. This article has 154 citations and is from a highest quality peer-reviewed journal.
(cortese2023candidatediagnosticbiomarkers pages 12-13): Samuele Cortese, Marco Solmi, Giorgia Michelini, Alessio Bellato, Christina Blanner, Andrea Canozzi, Luis Eudave, Luis C. Farhat, Mikkel Højlund, Ole Köhler‐Forsberg, Douglas Teixeira Leffa, Christopher Rohde, Gonzalo Salazar de Pablo, Giovanni Vita, Rikke Wesselhoeft, Joanna Martin, Sarah Baumeister, Natali S. Bozhilova, Christina O. Carlisi, Virginia Carter Leno, Dorothea L. Floris, Nathalie E. Holz, Eline J. Kraaijenvanger, Seda Sacu, Isabella Vainieri, Giovanni Ostuzzi, Corrado Barbui, and Christoph U. Correll. Candidate diagnostic biomarkers for neurodevelopmental disorders in children and adolescents: a systematic review. World Psychiatry, 22:129-149, Jan 2023. URL: https://doi.org/10.1002/wps.21037, doi:10.1002/wps.21037. This article has 154 citations and is from a highest quality peer-reviewed journal.
(cortese2023candidatediagnosticbiomarkers pages 2-3): Samuele Cortese, Marco Solmi, Giorgia Michelini, Alessio Bellato, Christina Blanner, Andrea Canozzi, Luis Eudave, Luis C. Farhat, Mikkel Højlund, Ole Köhler‐Forsberg, Douglas Teixeira Leffa, Christopher Rohde, Gonzalo Salazar de Pablo, Giovanni Vita, Rikke Wesselhoeft, Joanna Martin, Sarah Baumeister, Natali S. Bozhilova, Christina O. Carlisi, Virginia Carter Leno, Dorothea L. Floris, Nathalie E. Holz, Eline J. Kraaijenvanger, Seda Sacu, Isabella Vainieri, Giovanni Ostuzzi, Corrado Barbui, and Christoph U. Correll. Candidate diagnostic biomarkers for neurodevelopmental disorders in children and adolescents: a systematic review. World Psychiatry, 22:129-149, Jan 2023. URL: https://doi.org/10.1002/wps.21037, doi:10.1002/wps.21037. This article has 154 citations and is from a highest quality peer-reviewed journal.
(masi2023contemporarydiagnosisand pages 25-28): Gabriele Masi, Sara Carucci, Pietro Muratori, Carla Balia, Gianluca Sesso, and Annarita Milone. Contemporary diagnosis and treatment of conduct disorder in youth. Expert Review of Neurotherapeutics, 23:1277-1296, Oct 2023. URL: https://doi.org/10.1080/14737175.2023.2271169, doi:10.1080/14737175.2023.2271169. This article has 8 citations and is from a peer-reviewed journal.
(masi2023contemporarydiagnosisand pages 22-25): Gabriele Masi, Sara Carucci, Pietro Muratori, Carla Balia, Gianluca Sesso, and Annarita Milone. Contemporary diagnosis and treatment of conduct disorder in youth. Expert Review of Neurotherapeutics, 23:1277-1296, Oct 2023. URL: https://doi.org/10.1080/14737175.2023.2271169, doi:10.1080/14737175.2023.2271169. This article has 8 citations and is from a peer-reviewed journal.
(masi2023contemporarydiagnosisand pages 50-52): Gabriele Masi, Sara Carucci, Pietro Muratori, Carla Balia, Gianluca Sesso, and Annarita Milone. Contemporary diagnosis and treatment of conduct disorder in youth. Expert Review of Neurotherapeutics, 23:1277-1296, Oct 2023. URL: https://doi.org/10.1080/14737175.2023.2271169, doi:10.1080/14737175.2023.2271169. This article has 8 citations and is from a peer-reviewed journal.
(ozbay2024conductdisorderan pages 1-2): Ahmet ÖZBAY, Osman ÖZÇELİK, and Süleyman KAHRAMAN. Conduct disorder: an update. Psikiyatride Güncel Yaklaşımlar, 16:72-87, Mar 2024. URL: https://doi.org/10.18863/pgy.1331287, doi:10.18863/pgy.1331287. This article has 3 citations.