Smoking cessation intervention (SCI) v usual care (UC) during pregnancyâ€
| Weighted event rates | |||||
|---|---|---|---|---|---|
| Outcomes | No of trials | SCI | UC | RRR (95% CI) | NNT (CI) |
| †Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. | |||||
| Continued smoking | 31 (n=9081) | 87% | 91% | 7% (6 to 9) | 23 (18 to 29) |
| Low birth weight | 7 (n=6578) | 7.0% | 8.5% | 18% (3 to 31) | 68 (37 to 496) |