| Methods |
Country: USA
Setting: Nurse‐staffed health promotion clinic |
| Participants |
90 smokers attending health promotion clinic for annual visit |
| Interventions |
1. 50‐min session, self‐help materials, offer of training and counselling programme
2. as 1, plus 10‐min personalized motivational intervention with spirometry, CO measurement and discussion of symptoms |
| Outcomes |
PP abstinence at 1yr
Validation: expired CO |
| Notes |
Not in main comparison: effect of additional components
No group without intervention. (No true control group) |
| 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 |
Not specified |
| Incomplete outcome data (attrition bias)
All outcomes |
Unclear risk |
6/45 lost to follow‐up in control group, 13/45 lost to follow‐up in treatment group; counted as smokers in final analysis. "Although attrition was unevenly distributed in the two groups, the reasons for attrition were distributed similarly in both groups." |
