Characteristics | Spontaneous vaginal delivery(n = 99 679) | Assisted vaginal delivery(n = 15 987) | Caesarean in labour(n = 16 508) | Caesarean without labour(n = 10 755) |
Maternal | ||||
Maternal age >35 years (%) | 8908 (8.9) | 1377 (8.6) | 1792 (10.9) | 1696 (15.8) |
Nulliparous (%) | 36 848 (37.0) | 12 071 (75.5) | 11 331 (68.6) | 2344 (21.8) |
Smoking (%) | 28 720 (29.7) | 3945 (25.4) | 4239 (26.4) | 2844 (27.1) |
Maternal weight at delivery (kg), mean (SD) | 79.5 (14.1) | 79.7 (14.1) | 84.3 (16.5) | 83.4 (16.7) |
Pre-existing hypertension (%) | 628 (0.6) | 151 (0.9) | 222 (1.3) | 160 (1.5) |
Pre-existing diabetes (%) | 143 (0.1) | 54 (0.3) | 84 (0.5) | 71 (0.7) |
Gestational hypertension (%) | 7298 (7.3) | 2018 (12.6) | 2501 (15.2) | 839 (7.8) |
Gestational diabetes (%) | 2010 (2.0) | 366 (2.3) | 655 (4.0) | 424 (3.9) |
Regional anaesthesia (%) | 26 351 (26.4) | 9605 (60.1) | 12 461 (75.5) | 8376 (77.9) |
Induced labour (%) | 18 751 (18.8) | 4100 (25.6) | 5660 (34.3) | 0 (0.0) |
Neonatal | ||||
Gestational age at delivery (weeks), mean (SD) | 39.7 (1.3) | 39.8 (1.3) | 39.8 (1.4) | 38.9 (1.2) |
LGA (%) | 11 777 (11.8) | 1857 (11.6) | 3175 (19.3) | 1907 (17.8) |
SGA (%) | 9558 (9.6) | 1523 (9.5) | 1621 (9.9) | 952 (8.9) |
LGA, large for gestational age; SD, standard deviation; SGA, small for gestational age.