| Methods |
Setting: Childhood Cancer Survivors Study cohort, USA
Recruitment: Smokers contacted by telephone to assess eligibility and enrol, not selected for motivation |
| Participants |
794 smokers (excludes 2 deaths in control); 53% M, av. age 31, av. cigs/day 12 |
| Interventions |
1. S‐H control. Mailed manual (Clearing the Air) and letter from study physician
2. Peer counselling. Up to 6 calls in 7‐m period, by trained cancer survivor. Motivational, tailored to SoC. Free NRT available. Individually‐tailored materials before 1st call and other materials during intervention |
| Outcomes |
Abstinence at 12 m (7‐day PP)
Validation: none (warning that samples might be requested) |
| Notes |
No data on average number of calls. Longer‐term follow‐up, assessed at 2 ‐ 4 years, reported in Emmons 2009. Not used in MA ‐ sustained rates not reported. |
| 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 |
No details given |
| Blinding of outcome assessment (detection bias)
All outcomes |
Unclear risk |
Bogus pipeline procedure used, no further details provided |
| Incomplete outcome data (attrition bias)
All outcomes |
Unclear risk |
19% lost in intervention vs 24% in control at 12 m. All included as smokers in MA. Excluding losses does not affect MA |
