Kim 2003.

Study characteristics
Methods	Design: Randomized controlled trial Setting: 1 family practice housed in a tertiary care hospital, South Korea Recruitment: Participsnts were recruited from outpatient clinic of family medicine department
Participants	152 male adults who smoked (76 intervention, 76 control), av.age 46, av. cpd not reported
Interventions	Intervention: participants received telephone counseling (for 5 – 10 minutes using stage of change model and motivational interviewing techniques) delivered by a trained nurse at 8 weeks and 17 weeks. Participants also received educational material about smoking cessation provided to the control group Control: participants received educational material about smoking cessation
Outcomes	Abstinence (undefined) at 25 wks
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	Low risk	Used a random‐number table
Allocation concealment	Unclear risk	Not reported
Blinding of outcome assessors All outcomes	High risk	Smoking status was self‐reported and the intervention group received additional face‐to‐face contact
Incomplete outcome data All outcomes	Low risk	19/76 (25%) in the control and 21/76 (28%) in the intervention group were lost. Loss to follow‐up was therefore less than 50% overall and similar between groups