Pumariega 2020.

Methods	Study design: RCT Location: Brazil Setting: Psychosocial Care Center for Alcohol and Drugs Recruitment: from smokers seeking treatment at a substance centre Study dates: 2017
Participants	N = 52 Specialist population?: smokers seeking treatment Definition of smoker used: unclear Participant characteristics: 83% female; average age: 49 years; 74% white; 69% lower middle socioeconomic class; 43% high nicotine dependence
Interventions	Comparator: usual care based on CBT Intervention: mindfulness‐based relapse prevention
Outcomes	Definition of abstinence: unclear Longest follow‐up: unclear Biochemical verification: CO  Other relevant outcomes reported: depression, anxiety
Notes	Follow‐up period unclear

CBT: cognitive behavioural therapy; RCT: randomised controlled trial