Wood 2008.

Methods	Country: (multicentre) France, Italy, Poland, Spain, Sweden, UK, Netherlands, Denmark Recruitment setting: hospitals and general practices
Participants	2554 smokers who were patients at participating GP practices (at high risk of developing CHD) or hospitals (with established CHD). Demographics not reported
Interventions	1. Nurse coordinated lifestyle intervention. Includes nurse counselling (at least 8 weekly sessions) covering smoking cessation where participants were self‐reported smokers at baseline 2. Usual care (not specified)
Outcomes	Abstinence at 12 m (definition not provided) Validation: CO < 6 ppm
Notes	New for 2013 Subset of participants from larger study which included smokers and non‐smokers. N provided above is smokers followed up at 12 m, larger study had 5405 participants. Baseline N smoking not clear, study does not contribute to MA
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method not described
Allocation concealment (selection bias)	Unclear risk	Cluster‐randomized, method of allocation concealment not specified
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not specified for subgroup of smokers at baseline, not clear how smoking status of those smokers lost to follow‐up was reported