Self help v no self help for smoking cessation at longest follow up* (range 6–24 mo)

Weighted event rates
InterventionSelf helpNo self helpRBI (95% CI)NNT (CI)
* Abbreviations defined in glossary; RBI, CI, and NNT calculated from data in article.
Self help5.1%4.5%8% (−8 to 27)Not significant
Self help with no leaflet4.3%3.5%27% (2 to 58)123 (64 to 1771)