Table 3.
Severe acute maternal morbidity, postpartum haemorrhage, and manual removal of placenta among low risk nulliparous and parous women starting labour in primary care
| Variables | Nulliparous women (n=65 227) | Parous women (n=81 521) | ||
|---|---|---|---|---|
| Planned home birth (n=38 728 | Planned hospital birth (n=26 499) | Planned home birth (n=53 602) | Planned hospital birth (n=27 919) | |
| Severe acute maternal morbidity: | ||||
| No (No/1000) | 89 (2.3) | 82 (3.1) | 52 (1.0) | 65 (2.3) |
| Crude odds ratio (95% CI) | 0.74 (0.55 to 1.00) | Reference | 0.42 (0.29 to 0.60) | Reference |
| Adjusted odds ratio (95% CI) | 0.77 (0.56 to 1.06) | Reference | 0.43 (0.29 to 0.63) | Reference |
| Relative risk reduction (%, 95% CI) | 25.7 (−0.1 to 53.5) | Reference | 58.3 (33.2 to 87.5) | Reference |
| Blood transfusion ≥4 packed cells: | ||||
| No (No/1000) | 85 (2.2) | 68 (2.6) | 49 (0.9) | 54 (1.9) |
| Crude odds ratio (95% CI) | 0.86 (0.62 to 1.18) | Reference | 0.47 (0.32 to 0.70) | Reference |
| Adjusted odds ratio (95% CI) | 0.90 (0.65 to 1.27) | Reference | 0.45 (0.30 to 0.68) | Reference |
| Relative risk reduction (%, 95% CI) | 14.5 (−14.7 to 45.8) | Reference | 52.7 (24.9 to 85.3) | Reference |
| Postpartum haemorrhage: | ||||
| No (No/1000) | 1655 (43.1) | 1134 (43.3) | 1044 (19.6) | 1038 (37.6) |
| Crude odds ratio (95% CI) | 1.0 (0.92 to 1.07) | Reference | 0.51 (0.47 to 0.56) | Reference |
| Adjusted odds ratio (95% CI) | 0.92 (0.85 to 1.00) | Reference | 0.50 (0.46 to 0.55) | Reference |
| Relative risk reduction (%, 95% CI) | 0.5 (−6.8 to 7.9) | Reference | 47.9 (41.2 to 54.7) | Reference |
| Manual removal of placenta: | ||||
| No (No/1000) | 1099 (29.0) | 773 (29.8) | 451 (8.5) | 542 (19.6) |
| Crude odds ratio (95% CI) | 0.97 (0.89 to 1.07) | Reference | 0.43 (0.38 to 0.48) | Reference |
| Adjusted odds ratio (95% CI) | 0.91 (0.83 to 1.00) | Reference | 0.41 (0.36 to 0.47) | Reference |
| Relative risk reduction (%, 95% CI) | 2.8 (−6.1 to 11.8) | Reference | 56.9 (47.9 to 66.3) | Reference |
Adjusted relative risks adjusted for variables in table 1.