Black 2019.

Study characteristics
Methods	Study design: randomized controlled trial Study grouping: parallel group
Participants	Substance: various substances Baseline characteristics Mindfulness‐based intervention Number randomized: 114 Control 1 Number randomized: 111 Overall Number randomized: 225 Included criteria: client at site, female, age 18 to 65, diagnosed with SUD in clinical record, fluent in English Excluded criteria: inability to comprehend or sign consent, cognitive impairment, untreated psychotic disorder or severe chronic mental health conditions, suicidality during the prior 30 days, current prisoner, more than 6 months pregnant, not willing to sign a HIPAA form or be audio‐recorded Number missing: 41 Reason missing: missed first class, not found, passive decline, prison Baseline differences: none Age: 32.5 Percent female: 100% Race/Ethnicity: 58% Latina, 19.5% non‐Hispanic Black, 21% non‐Hispanic White, 1.5% other
Interventions	Intervention characteristics Mindfulness‐based intervention Group name: Moment‐by‐Moment in Women's Recovery Theory: MBSR and Vallejo and Amaro (2009) Duration: 6 weeks Timing: 2x week for 80 minutes Delivery: group Providers: experienced MBSR and MMWR teacher with on‐site masters‐level clinician with SUD experience Co‐intervention: residential TAU Integrity: yes Compliance: not reported Control 1 Group name: Neurobiology of Addiction Theory: Amaro et al. (2016) Duration: 6 weeks Timing: 2x week for 80 minutes Delivery: group Providers: Masters‐level educator with background and training in NA with on‐site masters‐level clinician with SUD experience Co‐intervention: residential TAU Integrity: yes Compliance: not reported
Outcomes	Penn Alcohol Craving Scale 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: NIDA, NIAAA Country: USA Setting: residential Authors name: David S. Black Institution: University of Southern California Email: davidbla@usc.edu Address: Keck School of Medicine of the University of Southern California, Los Angeles, CA, 90032. COI: none Diagnosis tool: DSM‐5 Diagnosis type: formal Funding: NIDA, NIAAA Journal: Behaviour Research and Therapy 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: urn randomization (p. 4)
Allocation concealment (selection bias)	Low risk	Judgement comment: concealed until first group meeting
Blinding of participants and personnel (performance bias) All outcomes	High risk	Judgement comment: no blinding of participants, but blinding of staff
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 measure
Incomplete outcome data (attrition bias) All outcomes	Low risk	Judgement comment: similar attrition across groups
Selective reporting (reporting bias)	High risk	Judgement comment: not all pre‐specified outcomes reported
Other bias: equivalence of baseline characteristics (selection bias)	Low risk	Judgement comment: no statistically significant differences at baseline