Feldstein 2007.

Methods	Design: RCT Follow‐up: 2 months Attrition: 7%
Participants	Mean age (years): 18.6 Sex: 78.2% female N participants: 55 Allocation: n = 40 intervention; n = 15 control Setting: college campus with higher risk students Country: USA
Interventions	Programme type: motivational interviewing Set‐up: single individual session Key components: MI with option of general info on alcohol use Duration: 45 min Control: assessment only
Outcomes	Outcomes: binge drinking; alcohol‐related problems Measures: Rutgers Alcohol Problem Index; modification of Monitoring the Future study; Working Alliance Inventory; Motivational Interview Treatment Integrity coding system
Funding and Declared Conflicts of Interest	Funded by University Graduate funding scheme. No information or declarations about potential conflicts of interest
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Using a Statistical Package for the Social Sciences random numbers list
Allocation concealment (selection bias)	Unclear risk	Insufficient information to make a judgement
Incomplete outcome data (attrition bias) All outcomes	Low risk	Low attrition (7%)
Selective reporting (reporting bias)	Low risk	All expected outcomes reported
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not possible to blind participants to intervention. Insufficient information to make a judgement about blinding of therapists
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Undergraduate assistants blind to randomisation collected follow‐up data
Unit of Analysis issues	Low risk	Not applicable