Self help v no self help for smoking cessation at longest follow up* (range 6–24 mo)
| Weighted event rates | ||||
|---|---|---|---|---|
| Intervention | Self help | No self help | RBI (95% CI) | NNT (CI) |
| * Abbreviations defined in glossary; RBI, CI, and NNT calculated from data in article. | ||||
| Self help | 5.1% | 4.5% | 8% (−8 to 27) | Not significant |
| Self help with no leaflet | 4.3% | 3.5% | 27% (2 to 58) | 123 (64 to 1771) |