Outcome | Number of trials | Follow up | Comparison | Event rates | RRI (95% CI) | NNH (CI) |
---|---|---|---|---|---|---|
*Abbreviations defined in glossary; RRI, NNH, and CI calculated from data in article using a fixed effects model. | ||||||
Pregnancy | 1 | 24 months | Prentif cap v diaphragm | 15.4% v 12.4% | 21% (−10 to 61) | Not significant |
1 | 6 months | FemCap v diaphragm | 9.5% v 5.5% | 71% (1 to 187) | 25 (13 to 660) |