Table 1

Study domains and sources of data collection

Domain	Source of data collection	T1		T2
Domain	Source of data collection	Youth	Caregiver	Youth	Caregiver	Clinician	Navigator
Sample description	Demographic questionnaire	✓	✓	✓	✓	✓
Health outcomes	Transition Readiness Assessment Questionnaire	✓	✓	✓	✓
	Columbia Impairment Scale	✓	✓	✓	✓
	Youth Self-Report	✓		✓
	Child Behaviour Checklist		✓		✓
	Adolescent Alcohol and Drug Involvement Scale			✓
Experience of care	Core Components of Effective Youth Transitions			✓	✓		✓
	Satisfaction with Mental Health Navigator Tool			✓	✓
	Qualitative Interviews			✓	✓	✓
Utilisation and cost	Assessment of Quality of Life-6D	✓		✓
Utilisation and cost	Health and Social Services Utilisation	✓	✓	✓	✓