| BF | Perforation incidence per 1000 women (95% CI) |
Perforation RR (95% CI) |
|---|---|---|
| Yes | 6.3 (4.1-9.3) | 6.3 (3.8-10.5) |
| No | 1.0 (0.7-1.4) | Ref |
| All women | 1.4 (1.1-1.8) | -- |
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