Aleixandre 1998.

Study characteristics
Methods	Design: Randomized controlled trial Setting: Primary care clinic, Spain Recruitment: Clinic & community volunteers
Participants	48 people who smoked (excludes 6 dropouts) 65% female, av. age 36, av. cpd 24 ‐ 27 Therapist: unclear, primary care clinic staff
Interventions	Intervention: participants received 4 x 30‐minute sessions of counseling over 4 weeks, which consisted of video, cognitive therapy, social influences and relapse prevention Control: participants received 3 minutes of advice immediately after randomization
Outcomes	Abstinence at 12m (abstinence not defined) Validation: None
Funding Source	Not reported
Author's declarations of interest	Not reported
Notes	Strategy: Adjunctive counseling Level: Patient Comparison type: Single component vs. standard care
Risk of bias
Bias	Authors' judgement	Support for judgement
Sequence Generation	Unclear risk	No details reported
Allocation concealment	Unclear risk	No details reported
Blinding of outcome assessors All outcomes	High risk	Participants self‐reported smoking status in person or by telephone. Intervention group received greater face‐to‐face contact
Incomplete outcome data All outcomes	Low risk	Loss to follow‐up low and similar between arms: 4/25 control, 2/29 intervention