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