Matthews 2009.

Methods	Study design: Randomized controlled trial Country: USA Recruitment: Community volunteers Group size: ˜7 participants
Participants	68 African‐American smokers (≥ 1 cpd) 90% women, av. age 45, av. cpd 13 Therapists: Intervention designed to be administered by Master's level clinicians; The culturally‐targeted group was led by white women, and the various standard treatment groups were led by white women, white men, Latino women, and bi‐racial women
Interventions	6 weekly sessions, 75 ‐ 90 mins, TQD scheduled for session 3, treatments matched for contact time. All participants offered nicotine patches 1. Standard treatment: CBT, motivational interviewing, 12‐step skills 2. Culturally‐targeted: Standard treatment was adapted to focus on themes relevant to African‐American smokers via culturally‐targeted themes, images and messages. An estimated 40% of standard materials were modified to be culturally targeted
Outcomes	7‐day PPA at 6 m Validation: CO ≤ 6 ppm
Notes	New for 2017 update Comparison 2.4 'Other miscellaneous comparisons ‐ Culturally‐targeted treatment vs standard treatment'
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described
Allocation concealment (selection bias)	Unclear risk	Not described
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Biochemical validation of abstinence
Incomplete outcome data (attrition bias) All outcomes	High risk	Only 1 culturally‐tailored group included; 100% of culturally‐tailored vs 58% of standard treatment completed follow‐up