Table 2 Rates of complications among 46,088 women who had a spontaneous vaginal delivery in 2015–16
| Number of women experiencing outcome (%) | Crude OR (95% CI) |
Adjusteda OR (95% CI) | p value | |||
|---|---|---|---|---|---|---|
|
among all women (n = 46,088) |
among women recorded as not having waterbirth (n = 39,824) |
among women recorded as having waterbirth (n = 6284) | ||||
| Maternal | ||||||
| Obstetric anal sphincter injury | 1480 (3.21%) |
1259 (3.16%) |
221 (3.53%) |
1.12 (0.97, 1.30) | 1.00 (0.86,1.16) | 0.99 |
| Postpartum haemorrhage > = 1500 ml | 552 (1.20%) |
496 (1.25%) |
56 (0.89%) | 0.72 (0.54,0.94) | 0.68 (0.51,0.90) | 0.007 |
| Neonatal | ||||||
| Apgar< 7 at 5 min of age | 270 (0.59%) |
234 (0.59%) |
36 (0.57%) | 0.98 (0.69,1.39) | 0.95 (0.66,1.36) | 0.78 |
| Neonatal admissionb | 1287 (3.09%) |
1168 (3.25%) |
119 (2.11%) | 0.64 (0.53,0.78) | 0.65 (0.53,0.78) | < 0.001 |