Table 2.
Characteristics of labour, birth, and post-delivery postnatal stay at postnatal enrolment
| Totals | Hypertensive in pregnancy | Normotensive in pregnancy | Comparison/Difference | |
|---|---|---|---|---|
| Maternal outcomes: number of women (n, %) | 1757 | 769 (43.8) | 988 (56.2) | |
| Use of regional anaesthetic in labour | 1228 (69.9) | 572 (74.4) | 656 (66.4) | < 0.0001 |
| Second/third/fourth degree perineal tear or episiotomy | 668 (38.0) | 250 (32.5) | 418 (42.3) | 0.060 |
| Length of postnatal inpatient stay, days (median, IQR) | 3 (2–4) | 3 (2–5) | 2 (1–3) | < 0.0001 |
| Admission to either high dependency unit or intensive care unitb | 181(10.3) | 86 (11.2) | 95 (9.6) | 0.287 |
| Length of stay in high dependency unit or intensive care unit, days (median, IQR) | 1 (1–1) | 1 (1–2) | 1 (1–1) | < 0.0001 |
| Perinatal outcomes: number of infants | 1803 | 799 (44.3) | 1004 (55.7) | |
| Live births | 1802 (99.9) | 799 (100.0) | 1003 (99.9) | 0.372 |
| Mode of birth | ||||
| Vaginal | 657 (36.4) | 252 (31.5) | 405 (40.3) | < 0.0001 |
| Forceps | 168 (9.3) | 68 (8.5) | 100 (10.0) | |
| Ventouse | 137 (7.6) | 55 (6.9) | 82 (8.2) | |
| Pre-labour Caesarean section | 462 (25.6) | 236 (29.5) | 226 (22.5) | |
| In-labour Caesarean section | 379 (21.0) | 188 (23.5) | 191 (19.0) | |
| Gestational age at birth, weeks (mean, SD) | 38.8 (2.3) | 38.2 (2.6) | 39.4 (1.9) | < 0.0001a |
| Birthweight, kg (mean, SD) | 3.198 (0.671) | 3.010 (0.743) | 3.348 (0.565) | < 0.0001a |
| Small for Gestational Age (<10th birthweight centile) | 184 (10.2) | 177 (14.6) | 67 (6.7) | < 0.0001 |
| Length of infant inpatient stay, days (mean, SD) | 4.2 (6.7) | 5.7 (9.1) | 3.1 (3.5) | < 0.0001a |
| Baby (ies) admitted to the neonatal unit | 230 (12.8) | 155 (19.4) | 75 (7.5) | < 0.0001 |
| Length of stay in neonatal unit, days (mean, SD) | 9.7 (9.6) | 11.5 (9.9) | 5.9 (7.6) | < 0.0001a |
OR odds ratio
aAdjusted for clustering by twins
bIncludes post Caesarean section recovery