Table 1 Characteristics of women with prolonged first stage of labour compared to no prolonged labour (total N = 3239)
|  | Prolonged 1st stage of labour (action line crossed) N = 178 | Not prolonged N = 3061 |
|---|---|---|
Age | ||
  < 20 | 69 (38.8%) | 747 (24.4%) |
 20–24 | 58 (32.6%) | 883 (28.8%) |
 25–29 | 19 (10.7%) | 575 (18.8%) |
 30–34 | 20 (11.2%) | 431 (14.1%) |
  ≥ 35 | 12 (6.7%) | 333 (10.9%) |
 Unknown | 0 | 92 (3.0%) |
Gestational age | ||
  < 32 | 0 (0.0%) | 51 (1.7%) |
 32–34 | 4 (2.2%) | 80 (2.6%) |
 35–36 | 34 (19.1%) | 380 (12.4%) |
 37–39 | 61 (34.3%) | 1109 (36.2%) |
  > 39 | 8 (4.5%) | 117 (3.8%) |
 Unknown | 71 (39.9%) | 1324 (43.3%) |
Parity | ||
 0 | 95 (53.4%) | 1055 (34.5%) |
 1 | 38 (21.3%) | 659 (21.5%) |
 2 | 17 (9.6%) | 503 (16.4%) |
 3 | 13 (7.3%) | 374 (12.2%) |
  ≥ 4 | 15 (8.4%) | 453 (14.8%) |
 Unknown | 0 (0.0%) | 17 (0.6%) |
Previous CS | ||
 0 | 159 (89.3%) | 2824 (92.3%) |
 1 | 19 (10.7%) | 176 (5.7%) |
  ≥ 2 | 0 (0.0%) | 37 (1.2%) |
 Unknown | 0 (0.0%) | 24 (0.8%) |
Type of pregnancy | ||
 Singleton | 171 (96.1%) | 2995 (97.8%) |
 Twins | 7 (3.9%) | 66 (2.2%) |
Birthweight | ||
  < 1500 | 0 (0.0%) | 29 (0.9%) |
 1500–1999 | 4 (2.2%) | 58 (1.9%) |
 2000–2499 | 10 (5.6%) | 321 (10.5%) |
 2500–2999 | 52 (29.2%) | 1081 (35.3%) |
 3000–3499 | 67 (37.6%) | 1191 (38.9%) |
  ≥ 3500 | 37 (20.8%) | 323 (10.6%) |
 Unknown | 8 (4.5%) | 58 (1.9%) |
Mode of birth | ||
 SVD | 35 (19.7%) | 2624 (85.7%) |
 AVD | 1 (0.6%) | 59 (1.9%) |
 CS | 142 (79.8%) | 378 (12.3%) |
Oxytocin | ||
 Yes | 21 (11.8%) | 65 (2.1%) |
 No | 157 (88.2%) | 2994 (97.8%) |
 Unknown | 0 (0.0%) | 2 (0.1%) |
Rupture of membranes | ||
 Spontaneous | 56 (31.5%) | 2377 (77.6%) |
 Artificial (amniotomy) | 28 (15.7%) | 385 (12.6%) |
 On CS | 13 (7.3%) | 69 (2.3%) |
 Unknown | 81 (45.5%) | 230 (7.5%) |
| Â | 178 | 3061 |