Population
IOL at 40 GW (40+0 to 40+6) N=456 n (%) IOL at 41 GW (41+0 to 41+6) N=318 n (%) SOL (40+0 to 41+6) N=1585 n (%)
Maternal Age < 35 years ≥ 35 years 401 (87.9) 55 (12.1) 290 (91.2) 28 (8.8) 1424 (89.8) 161 (10.2)
Education None Primary Secondary Higher Missing 1 (0.2) 10 (2.2) 353 (77.4) 1,3 91 (20.0) 1 1 (0.2) 2 (0.6) 4 (1.3) 266 (83.6) 46 (14.5) 0 2 (0.1) 26 (1.6) 1341 (84.6) 211 (13.3) 5 (0.4)
Working status Working Housewife Missing 81 (17.8) 370 (81.1) 5 (1.1) 48 (15.1) 270 (84.9) 0 227 (14.3) 1344 (84.8) 14 (0.9)
Marital status Married Unmarried Unmarried living together Missing 451 (98.9) 3 (0.7) 1 (0.2) 1 (0.2) 311 (97.8) 7 (2.2) 2 0 0 1570 (98.6) 14 (0.9) 2 (0.1) 6 (0.4)
Parity 0 ≥1 260 (57.0) 1 196 (43.0) 1 198 (62.3) 2 120 (37.7) 2 754 (47.6) 831 (52.4)
Asian criteria-based BMI 25 Underweight (<18.4) Normal (18.5-22.9) Overweight (23-27.4) 38 (8.3) 312 (68.4) 106 (23.2) 33 (10.4) 190 (59.7) 2, 3 95 (29.9) 2,3 159 (10.0) 1061 (67.0) 365 (23.0)
Operator delivering care Nurse Midwife House Officer Mid-level staff * Consultant Missing 200 (43.9) 1 110 (24.1) 4 (0.9) 140 (30.7) 1 2 (0.4) 0 116 (36.5) 2, 3 101 (31.8) 3 4 (1.3) 96 (30.2) 2 1 (0.3) 0 899 (56.7) 431 (27.2) 24 (1.5) 224 (14.1) 3 (0.2) 4 (0.3)
Neonatal weight at birth <2000 2000 to 2499 2500 to 3499 3500 to 4000 >4000 Missing 0 13 (2.9) 374 (82.0) 57 (12.5) 11 (2.4) 1 1 (0.2) 0 3 (0.9) 2 246 (77.4) 61 (19.2) 2, 3 8 (2.5) 2 0 0 55 (3.5) 1278 (80.6) 234 (14.8) 13 (0.8) 5 (0.3)