# Table 3 Intrapartum interventions, birth outcomes and duration of labour

Variables Total (N = 1209) Nullipara (n = 841) Multipara (n = 368) Statistic P value
Amniotomy, n (%)
Yes 331 (27.4) 256 (30.4) 75 (20.4) 13.029b <.001
No 878 (72.6) 585 (69.6) 293 (79.6)
Use of oxytocin, n (%)
Yes 458 (37.9) 391 (46.5) 67 (18.2) 87.036b <.001
No 751 (62.1) 450 (53.5) 301 (81.8)
Continuous EFM, n (%)
Yes 641 (53.0) 522 (62.1) 119 (32.3) 90.847b <.001
No 568 (47.0) 319 (37.9) 249 (67.7)
Epidural analgesia, n (%)
Yes 639 (52.9) 538 (64.0) 101 (27.4) 137.055b <.001
No 570 (47.1) 303 (36.0) 267 (72.6)
Mode of delivery, n (%)
Vaginal birth 983 (81.3) 706 (83.9) 277 (75.3) 12.678b <.001
ICS 226 (18.7) 135 (16.1) 91 (24.7)
Neonatal birth weight, n (%)
< 2500 g 193 (16.0) 150 (17.8) 43 (11.7) 2.308b 0.315
2500-4000 g 959 (79.3) 654 (77.8) 305 (82.9)
> 4000 g 57 (4.7) 37 (4.4) 20 (5.4)
Duration of 1st SOL (706/277)a, median (P25, P75) 7.00 (4.00, 11.00) 8.50 (5.50, 13.00) 4.50 (2.58 7.00) 50,391.000c <.001
Duration of 2nd SOL (706/277)a, median (P25, P75) 0.63 (0.32, 1.07) 0.78 (0.45, 1.18) 0.28 (0.16, 0.53) 42,825.000c <.001
Duration of total SOL (706/277)a, median (P25, P75) 8.00 (4.83, 12.25) 9.38 (6.33, 14.10) 5.08 (3.00, 7.83) 46,859.500c <.001
1. EFM Electronic fetal monitoring; ICS Intrapartum cesarean section; SOL Stage of labour
2. a Numbers in parentheses indicate number for whom this information was available (nullipara/multipara); b Chi-square test; c Mann-Whitney U test