Antisocial personality disorder

Definition

• A chronic and pervasive personality disorder characterised by disregard for the rights of others, persistent rule-breaking, deceitfulness, impulsivity, and lack of remorse
• Associated with early conduct disorder in childhood or adolescence
• Often comorbid with substance use, mood disorders, and other personality disorders

DSM-5 Diagnostic Criteria

• Pervasive pattern of disregard for and violation of the rights of others since age 15, with ≥3 of the following:
  • Failure to conform to social norms or lawful behaviours
  • Deceitfulness (e.g., lying, use of aliases, conning others)
  • Impulsivity or failure to plan ahead
  • Irritability and aggressiveness (e.g., repeated fights or assaults)
  • Reckless disregard for safety of self or others
  • Consistent irresponsibility (e.g., failure to work or honour obligations)
  • Lack of remorse (e.g., indifference or rationalising harm caused to others)
• Individual is at least 18 years old
• Evidence of conduct disorder with onset before age 15
• Antisocial behaviour not occurring exclusively during schizophrenia or bipolar disorder

ICD-10 Classification (F60.2 – Dissocial Personality Disorder)

• Persistent disregard for social obligations and callous unconcern for others
• Marked inability to maintain enduring relationships
• Low frustration tolerance and aggression
• Incapacity to feel guilt or learn from experience
• Tendency to blame others or rationalise behaviour
• Closely matches DSM-5 but may be diagnosed without documented childhood conduct disorder

Epidemiology (Australia)

• Lifetime prevalence: ~1–4% in general population
• Significantly more common in males
• High prevalence in forensic settings and among incarcerated individuals
• Increased rates in individuals with childhood conduct disorder, substance misuse, and adverse childhood experiences

Risk Factors

• Childhood conduct disorder
• History of abuse, neglect, or trauma
• Parental criminality or mental illness
• Growing up in unstable or violent environments
• Substance misuse
• Head injury or neurological impairment
• Low socioeconomic background
• Comorbid ADHD or learning disorders in childhood

Clinical Features

• Persistent violation of social norms and legal rules
• Manipulative, deceitful, or exploitative interpersonal behaviour
• Irritability, aggression, or violence
• Irresponsibility in work, relationships, or finances
• Frequent job loss or unstable housing
• Lack of empathy or remorse
• Shallow emotions or superficial charm
• History of arrests, imprisonment, or antisocial lifestyle
• Substance misuse, especially alcohol and stimulants

Comorbidities

• Substance use disorders
• Depression or dysthymia
• Borderline personality disorder
• Anxiety disorders
• ADHD
• PTSD
• Gambling disorder

Differential Diagnoses

• Borderline personality disorder (more emotional lability and fear of abandonment)
• Narcissistic personality disorder (less impulsive, more focused on grandiosity)
• Substance-induced behavioural disturbance
• Psychotic disorders (e.g., schizophrenia with disorganised or aggressive behaviour)
• Autism spectrum disorder (if social difficulties are misinterpreted)
• Intermittent explosive disorder

Assessment

• Comprehensive history including childhood conduct symptoms
• Collateral history from family, school, or justice system
• Mental state examination with focus on impulsivity, aggression, and empathy
• Standardised tools (e.g., Hare Psychopathy Checklist – for forensic use)
• Screen for comorbid substance use, mood symptoms, and trauma

Investigations

• No specific tests
• Screen for substance use (urine drug screen, alcohol history)
• Physical exam if history of head injury or neurological signs
• Neuropsychological testing if cognitive impairment suspected
• Consider referral for formal psychiatric assessment

Complications

• Criminal behaviour and incarceration
• Relationship breakdown and domestic violence
• Unemployment and social marginalisation
• Substance dependence and overdose risk
• Homelessness and financial instability
• Early mortality (accidents, suicide, violence)
• Poor treatment adherence in medical and psychiatric care

Psychoeducation

• Explain the nature of the disorder and its chronic course
• Emphasise consequences of behaviour, including legal and health outcomes
• Encourage insight into interpersonal difficulties and consequences
• Set clear, consistent boundaries in therapeutic relationships
• Engage family only with patient consent (if appropriate)

Psychological Management

• Limited evidence for effectiveness, but some benefit from
  • Cognitive Behavioural Therapy (CBT) focused on impulse control and empathy
  • Schema therapy in selected cases
  • Motivational interviewing for substance misuse
• Focus on harm reduction, risk management, and goal-setting
• Therapy must be structured, consistent, and avoid dependency or collusion
• Often better managed in forensic or specialised mental health services

Pharmacological Management

• No medication treats ASPD directly
• Medications may be used for comorbid conditions:
  • SSRIs for depression, irritability, or impulsivity
  • Antipsychotics for aggression or thought disturbance
  • Mood stabilisers (e.g., sodium valproate) for behavioural dysregulation
• Avoid benzodiazepines due to abuse potential
• Use caution and monitor closely for adherence and misuse

Follow-Up and Monitoring

• Establish clear expectations and structured follow-up
• Monitor for violent or risky behaviours
• Review comorbid psychiatric and medical conditions
• Involve community mental health or forensic teams if needed
• Document interactions clearly and maintain professional boundaries

Referral and Escalation

• Refer to psychiatrist for diagnostic confirmation or complex case management
• Forensic mental health referral if justice system involved or risk to others
• Specialist services for comorbid substance misuse or personality disorders
• Risk management planning for violence, suicidality, or non-adherence

Community and Support Resources

• Community mental health services
• Alcohol and drug services
• Forensic support programs (e.g., Forensicare in Victoria)
• Homelessness and social support agencies
• Anger management or violence prevention programs
• Legal aid or case management for justice-involved individuals