Table 3. Postpartum characteristics of the study population (n = 1.457.576) and the association between these characteristcs and postpartum haemorrhage.
| Pre-eclampsia | Postpartum haemorrhage | Unadjusted odds ratio for | |||||||||||
| Yes* | No* | Yes* | No* | Total* | postpartum haemorrhage | ||||||||
| Characteristic | n | (%) | n | (%) | n | (%) | n | (%) | n | (%) | OR | (95% CI) | |
| Pregnant women | 31560 | (2.2) | 1426016 | (97.8) | 62864 | (4.3) | 1394712 | (95.7) | 1457576 | (100.0) | |||
| Postpartum characteristics | |||||||||||||
| Manual placenta removal† | |||||||||||||
| No | 30348 | (96.3) | 1389321 | (98.1) | 47128 | (75.2) | 1372541 | (99.1) | 1419669 | (98.1) | 1.00 | reference | |
| Yes | 1181 | (3.7) | 26759 | (1.9) | 15525 | (24.8) | 12415 | (0.9) | 27940 | (1.9) | 33.39 | (32.62 to 34.19) | |
| Missing | 31 | 9936 | 211 | 9756 | 9967 | ||||||||
| Birthweight, grams† | |||||||||||||
| ≤999 | 1183 | (3.7) | 9013 | (0.6) | 832 | (1.3) | 9364 | (0.7) | 10196 | (0.7) | 2.08 | (1.96 to 2.23) | |
| 1000 – 1999 | 4639 | (14.7) | 17882 | (1.3) | 1259 | (2.0) | 21262 | (1.5) | 22521 | (1.5) | 1.48 | (1.41 to 1.56) | |
| 2000 – 2999 | 12035 | (38.1) | 230514 | (16.2) | 9663 | (15.4) | 232886 | (16.7) | 242549 | (16.6) | 1.01 | (0.99 to 1.03) | |
| 3000 – 3999 | 11604 | (36.8) | 942823 | (66.1) | 37305 | (59.4) | 917122 | (65.8) | 954427 | (65.5) | 1.00 | reference | |
| ≥4000 | 2097 | (6.6) | 225442 | (15.8) | 13776 | (21.9) | 213763 | (15.3) | 227539 | (15.6) | 1.59 | (1.56 to 1.62) | |
| Missing | 2 | 342 | 29 | 315 | 344 | ||||||||
Missing values of postpartum haemorrhage and pre-eclampsia are excluded.
2test between pre-eclampsia and no pre-eclampsia, P ≤ 0.0001. X