Table 2.

Details of study assessments

Assessment/procedure	Details
Demographic and criminographic information	Age, ethnicity, marital status, children, education, employment, accommodation, incarceration history, institution history (eg, juvenile detention centre, special school).
Barratt Impulsiveness Scale (BIS-11)36	30-item questionnaire that assesses three subtypes of trait impulsiveness: attentional impulsiveness, motor impulsiveness and non-planning impulsiveness.
State Trait Anger Expression Inventory (STAXI-2)37	57-item questionnaire that records subjective levels of anger in different situations including currently, in general and general behaviour when angry.
Anger, Irritability and Assault Questionnaire (AIAQ)38	42-item questionnaire that records subjective levels of anger, irritability and aggression in the past 2 weeks.
Short-Form-12 (SF-12)39	12-item questionnaire that provides a validated index of subjectively perceived quality of life.
Duke Social Support Index (DSSI)40	11-item questionnaire that provides a validated index of the degree of social support available to the participant.
Wechsler Individual Achievement Test (WIAT-11)61	Provides a measure of reading ability.
Psychiatric assessment	Assesses mental health and enquires about psychiatric history, history of suicide and self-harm, and sexual history.
Mini International Neuropsychiatric Interview (MINI; post-traumatic stress disorder, generalised anxiety disorder, social phobia, antisocial personality disorder, obsessive–compulsive disorder, panic disorder only)62	Provides an index of levels of anxiety, and personality disorder over a defined interval of time prior to the interview.
International Personality Disorders Examination (IPDE)63	Assesses impulsive personality disorder, dissocial personality disorder, borderline personality disorder.
Beck Depression Inventory-II (BDI-II)43	21-item questionnaire that enquires about symptoms over the past week to measure the severity of depression.
Kessler Psychological Distress Scale (K-10)44	10-item questionnaire intended to yield a global measure of distress based on questions about anxiety and depressive symptoms in past 4 weeks.
Alcohol Use Disorders Identification Test (AUDIT)42	Measures alcohol consumption in the previous 12 months. Indicates safe, harmful and hazardous alcohol use.
Substance use	Provides information on alcohol and drug use history. Questions derived from the 2001 New South Wales inmate health survey.41
Eysenck Impulsivity Questionnaire (EIQ)64	54-item questionnaire that assesses impulsive personality.
Level of Service Inventory-Revised (LSI-R)49	Measures offender risks and needs. Predictive of recidivism.
Self-reported offending*	Enquires about whether a criminal act or offence has been committed in the past 8 weeks, and if so, details about the offence(s).
Sniffin’ Sticks (16-item version)65	This is used to examine for anosmia (loss of sense of smell), a possible proxy for prefrontal cortex damage.
Barnes’ Akathisia Rating Scale (BARS)60	A rating scale to assess drug-induced akathisia.
Compliance monitoring	Provides a self-reported number of days per week, on average, that the participant ingested the study medication.

*Subject to mandatory reporting under s316 of the NSW Crimes Act 1900.⁶⁶