RBR‐7yx9hd.

Study characteristics
Methods	Design: randomized controlled trial Setting: primary healthcare unit, Brazil Recruitment: no details provided
Participants	Target was 80 adults who smoked (final recruitment not confirmed). Eligible participants were adult daily cigarettes users for at least 1 year, av. age not reported, av. cpd not reported
Interventions	Intervention: participants received a 40‐minute counseling session on cessation using brief intervention with motivational interviewing by a trained interviewer with a degree in psychology or medicine Control: participants received 1 session per week of standard treatment for smoking with a cognitive‐behavioral approach for 8 weeks
Outcomes	7‐day PPA at 3m and 6m Validation: none Quit attempts
Funding Source	Universidade Federal de Juiz de Fora ‐ Juiz de Fora, MG, Brazil
Author's declarations of interest	Not reported
Notes	Strategy: Adjunctive counseling Level: Patient Comparison type: Single component vs. standard care Trial ID: RBR‐7yx9hd. The study lead investigator was contacted by email and she confirmed that they do not intend to analyse and publish study results.
Risk of bias
Bias	Authors' judgement	Support for judgement
Sequence Generation	Unclear risk	Not reported
Allocation concealment	Unclear risk	Not reported
Blinding of outcome assessors All outcomes	Unclear risk	Not reported
Incomplete outcome data All outcomes	Unclear risk	Not reported