Table 1.

Inroads study timeline.

Assessments		Study period
		Enrollment	Pre-allocation	Allocation	Post-allocation
			t1 (baseline)		t2 (8 weeks)	t3 (6 months)
Enrollment
	Eligibility screen	✓a	–b	–	–	–
	Informed consent	✓	–	–	–	–
	Allocation	–	–	✓	–	–
Intervention
	Inroads c	–	–	✓	✓	–
	Control	–	–	✓	✓	–
Assessments
	Alcohol Use Disorder Identification Test	✓	–	–	✓	✓
	Generalized Anxiety Disorder-7	✓	–	–	✓	✓
	Mini-Social Phobia Inventory	✓	–	–	–	–
	National Institute on Drug Abuse quick screen	✓	–	–	–	–
	Psychosis Screening Questionnaire	✓	–	–	–	–
	Alcohol Outcome Expectancies tension-reduction scale	–	✓	–	✓	✓
	Brief Young Adult Alcohol Consequences Questionnaire	–	✓	–	✓	✓
	Depression and Anxiety Stress Scale	–	✓	–	✓	✓
	Drinking Motives Questionnaire-Revised	–	✓	–	✓	✓
	Emotion Regulation Questionnaire	–	✓	–	✓	✓
	Life Events Checklist for Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5)	–	✓	–	✓	✓
	Post-Traumatic Stress Disorder symptom checklist for DSM-5	–	✓	–	✓	✓
	Self-Compassion Scale-Short Form	–	✓	–	✓	✓
	Sheehan Disability Scale	–	✓	–	✓	✓
	Social Phobia Scale and Social Interaction Anxiety Scale-Short forms	–	✓	–	✓	✓
	Substance Use Risk Profile Scale	–	✓	–	✓	✓
	Treatment Acceptability Questionnaire	–	–	–	✓	–
	Timeline Follow-Back	–	✓	–	✓	✓
	Working Alliance Inventory-Short Form	–	–	–	✓	–

^aIndicates that enrollment, intervention delivery and/or assessments occurred at these time points.

^bIndicates that enrollment, intervention delivery and assessments were not relevant at these time points.

^cInroads intervention includes 5 modules which are delivered over 5 weeks, with flexibility in module completion provided up until t₂ (8-week post- baseline assessment).