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Table 2 Onset of labour by maternal characteristics

From: Caesarean section following induction of labour in uncomplicated first births- a population-based cross-sectional analysis of 42,950 births

  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