Osinubi 2003.

Methods	Setting: Occupational health service, USA Recruitment: Asbestos‐exposed workers and retirees attending medical screening, not selected for motivation
Participants	58 smokers; 93% M, av. age 52, av. cigs/day 22
Interventions	All participants received brief physician advice at screening 1. Enrolment in Free & Clear, proactive TC, 5 calls, hotline access, pharmacotherapy available 2. Instructions to obtain support from personal physician, S‐H materials and resources
Outcomes	Self‐reported abstinence at 6 m (30‐day PP) Validation: none
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Randomised, method not described
Allocation concealment (selection bias)	Unclear risk	Sealed envelopes, not stated if opaque and numbered
Blinding of outcome assessment (detection bias) All outcomes	High risk	Self‐reported outcomes from participants not blinded to treatment condition. Level of personal contact differed between arms
Incomplete outcome data (attrition bias) All outcomes	Low risk	32% lost to follow‐up, comparable across groups, losses included as smokers