Mermelstein 2015.

Study characteristics
Methods	Study design: randomized controlled trial Study grouping: parallel group
Participants	Substance: alcohol Baseline characteristics Mindfulness‐based intervention Number randomized: 38 No treatment Number randomized: 38 Overall Number randomized: 76 Included criteria: 18 to 24, at least one binge drinking episode in past 2 weeks, full‐time non‐commuter student, not currently under the influence of alcohol or illicit substances Excluded criteria: self‐reported diagnosis of schizophrenia or other psychotic disorder Pretreatment: no differences on consequences of alcohol use at baseline, no other baseline between‐group tests reported Number missing: 3 Reason missing: lost to follow‐up, reasons unknown Baseline differences: no differences on consequences of alcohol use at baseline, no other baseline between‐group tests reported Age: 19.1 Percent female: 50% Race/Ethnicity: 91% white, 4% black, 4% multiracial, 1% Latino
Interventions	Intervention characteristics Mindfulness‐based intervention Group name: Brief mindfulness intervention Theory: Breath meditation (UCLA Mindful Awareness Research Center) and urge surfing (Bowen et al., 2011) Duration: one session with homework assigned for 4 weeks Timing: one time per week for 1 hour Delivery: individual Providers: 3 doctoral clinical psychology students Co‐intervention: Cue exposure Integrity: not reported Compliance: assessed practices per week Control 1: no treatment control Co‐intervention: cue exposure
Outcomes	Drinking episodes Outcome type: continuous outcome Reporting: fully reported Direction: lower is better Data value: endpoint Time point: post‐treatment Total drinks per week Outcome type: continuous outcome Reporting: fully reported Direction: lower is better Data value: endpoint Time point: post‐treatment Treatment acceptability (attrition) Outcome type: dichotomous outcome Reporting: fully reported Direction: lower is better Data value: endpoint Time point: post‐treatment
Identification	Sponsorship source: none reported Country: USA Setting: not residential Authors name: Liza C. Mermelstein Institution: Brown University Email: lizamermelstein@gmail.com Address: Liza C. Mermelstein, Alpert Medical School of Brown University–Psychiatry and Human Behavior, 222 Richmond Street, Providence, RI 02903 COI: not reported Diagnosis tool: at least one binge drinking episode in past 2 weeks Diagnosis type: Informal Funding: none reported Journal: Psychology of Addictive Behaviors Publication type: published report Secondary publications: none
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Judgement comment: no description
Allocation concealment (selection bias)	Unclear risk	Judgement comment: not reported
Blinding of participants and personnel (performance bias) All outcomes	High risk	Judgement comment: no blinding
Blinding of outcome assessment (detection bias) Treatment acceptability (attrition)	Low risk	Objective measure
Blinding of outcome assessment (detection bias) All non‐attrition outcomes	High risk	Self‐report
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Judgement comment: similar attrition rates but reasons not given
Selective reporting (reporting bias)	Low risk	Judgement comment: no protocol but clear statement of plausible primary outcomes
Other bias: equivalence of baseline characteristics (selection bias)	Low risk	Judgement comment: no baseline differences