Risk of placental abruption in second pregnancy in relation to partner change between the first and second pregnancies: Norway, 1967–2009
| Adjusted OR (95% CI) for placental abruption in second pregnancy | ||||
|---|---|---|---|---|
| Unadjusted | Adjusted for birth interval | Complete adjustment* | Complete adjustment, 1999–2009† | |
| No abruption in 1st pregnancy | ||||
| Same father | 1.00 (Referent) | 1.00 (Referent) | 1.00 (Referent) | 1.00 (Referent) |
| Different father | 1.39 (1.26 to 1.53) | 1.17 (1.04 to 1.32) | 1.13 (1.00 to 1.28) | 1.01 (0.79 to 1.32) |
| Abruption in 1st pregnancy | ||||
| Same father | 1.00 (Referent) | 1.00 (Referent) | 1.00 (Referent) | 1.00 (Referent) |
| Different father | 0.96 (0.56 to 1.66) | 1.35 (0.71 to 2.57) | 1.27 (0.66 to 2.44) | 0.98 (0.75 to 1.28) |
*Adjusted for birth interval, period of birth, maternal age at first birth.
†Adjustments as in previous multivariable model plus smoking (restricted to 1999–2009 data).