| Methods |
Country: Spain
Recruitment: Primary Care Centre (participants not selected for motivation to quit) |
| Participants |
425 smokers (at least 1 cpd in past wk) |
| Interventions |
1. Physician advice
2. Physician advice and nicotine gum
3. Nurse counselling (up to 15 mins)
Intensity: Low
All received booklet and offer of follow‐up visit or call |
| Outcomes |
Abstinence at 12 m (sustained at 2 m and 12 m)
Validation: 1/4 validated by expired CO at 2 m |
| Notes |
3 vs 1 |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Random sequence generation (selection bias) |
Unclear risk |
"Each PCT was randomly allocated to perform the three different interventions successively. Each physician was assigned to a different intervention option every week, so that during that week they could not include any patient under an intervention option different from previously scheduled." Method of sequence generation not specified |
| Allocation concealment (selection bias) |
High risk |
Randomization does not allow blinding of allocation |
| Incomplete outcome data (attrition bias)
All outcomes |
Unclear risk |
76/425 participants lost to follow‐up; numbers lost to follow‐up not broken down by group; those lost to follow‐up at 2 m not included in final analysis |
