Self help v no self help for smoking cessation at longest follow up (range 6 to 24 mo)*
| Weighted event rates | ||||
|---|---|---|---|---|
| Number of studies | Self help | No self help | RBI (95% CI) | NNT (CI) |
| *Abbreviations defined in glossary. RBI, NNT, and CI calculated from data in article. †Control group received no written materials. | ||||
| 10 | 5.1% | 4.5% | 8% (−8 to 27) | Not significant |
| 7† | 4.3% | 3.5% | 27% (2 to 58) | 123 (64 to 1771) |