Kottke 1989.

Methods	Cluster RCT Follow up: providers: DONE patients: NOT CLEAR Blinded assessment: NOT CLEAR Baseline: NOT DONE Reliable outcomes: NOT CLEAR Protection against contamination: DONE Overall quality: LOW
Participants	66 doctors general/family practices providing smoking cessation interventions for 1653 patients Country: USA Proportion of eligible providers who participated: 6% General practice Academic/Teaching setting: NOT CLEAR Type of targeted behaviour: PREVENTIVE CARE (smoking counselling) Complexity of targeted behaviour: MEDIUM
Interventions	1. CME: 6‐hr workshop of mixed format + 100 copies of 'Quit and win' smoking cessation manual for patients 2. 100 copies of 'Quit and win' smoking cessation manual for patients 3. No intervention control
Outcomes	Professional practice: patients' reports of smoking cessation counselling behaviours Patient: number of patients smoking after 1 year Seriousness of outcome: MODERATE
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	D ‐ Not used