Table 2 Onset of labour by maternal characteristics
Spontaneous and not augmented | Spontaneous and augmented | Induced | No labour | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
n | % | n | % | n | % | n | % | p-value | ||
Maternal age | <0.001 | |||||||||
20–24 years | 4129 | 53.1 | 2912 | 37.4 | 580 | 7.5 | 160 | 2.1 | 7781 | |
25–29 years | 7521 | 49.2 | 5864 | 38.4 | 1402 | 9.2 | 503 | 3.3 | 15,290 | |
30–34 years | 6482 | 44.3 | 5778 | 39.5 | 1564 | 10.7 | 813 | 5.6 | 14,637 | |
35–39 years | 1751 | 38.6 | 1756 | 38.7 | 534 | 11.8 | 493 | 10.9 | 4534 | |
40–44 years | 234 | 33.1 | 182 | 25.7 | 102 | 14.4 | 190 | 26.8 | 708 | |
Gestation (completed weeks) | <0.001 | |||||||||
37 | 1213 | 62.5 | 520 | 26.8 | 68 | 3.5 | 140 | 7.2 | 1941 | |
38 | 2986 | 49.1 | 1893 | 31.1 | 299 | 4.9 | 907 | 14.9 | 6085 | |
39 | 6171 | 50.6 | 4703 | 38.6 | 613 | 5.0 | 699 | 5.7 | 12,186 | |
40 | 9747 | 42.9 | 9376 | 41.2 | 3202 | 14.1 | 413 | 1.8 | 22,738 | |
Admission status | <0.001 | |||||||||
Public | 12,975 | 53.8 | 9054 | 37.6 | 1484 | 6.2 | 597 | 2.5 | 24,110 | |
Private | 7142 | 37.9 | 7438 | 39.5 | 2698 | 14.3 | 1562 | 8.3 | 18,840 | |