Table 1.

Overview of self-report questionnaires

Health domain	Psychometric tool
Distress	Kessler Psychological Distress Scale-10 62 63
Suicidal thoughts and behaviour	The Suicidal Ideation Attributes Scale 64 The Columbia–Suicide Severity Rating Scale65
Psychosis-like experiences	Prodromal Questionnaire-1666
Mania-like experiences	Altman Self-Rating Mania Scale67
Daily activities	Youth not in education or employment, Organisation for Economic Co-operation and Development Census of Population and Housing, Australian Bureau of Statistics WHO Disability Assessment Schedule-2.0 68—‘unable to carry out usual activities’ question Work and Social Adjustment Scale 69 Social and Occupational Functioning Assessment Scale—70adapted for self-report
Self-harm	Brief Non-suicidal Self-Injury Assessment Tool71
Tobacco	The Alcohol, Smoking and Substance Involvement Screening Test (ASSIST)72 73
Alcohol	ASSIST72 73 Alcohol Use Disorder Identification Test - Consumption (AUDIT-C)74
Relationships	‘Perceived social support’ and ‘conflict in close relationships’ were measured by an adapted version of the Schuster’s Social Support Scale 75
Depression	Quick Inventory of Depressive Symptomatology—self-report76
Anxiety	Overall Anxiety Severity and Impairment Scale77
Physical health	Height, weight and waist circumference International Physical Activity Questionnaire78 79
Sleep-wake cycle	Sleep timing items are based on the Pittsburgh Sleep Quality Index80 and Munich ChronoType Questionnaire81 82 Sleep quality items are based on expert consensus in the literature
Post-traumatic stress	Primary Care Posttraumatic Stess Disorder (PTSD) Screen for Diagnostic and Statistical Manual of Mental Disorders Version 5 (DSM-5)83
Eating behaviours and body image	Modelled on the Eating Disorder Examination.84 Derived from structured interview questions from the Health Omnibus Surveys
Cannabis	ASSIST72 73