Skip to main content

Table 2 Adverse outcomes in study population by maternal age groups (N = 8509)

From: Birth outcomes across the spectrum of maternal age: dissecting aging effect versus confounding by social and medical determinants

Adverse Pregnancy Outcomes < 20 years 20–29 years 30–39 years 40+ years Total P-valuea
N % N % N % N % N %
Total 907 100 4305 100 2960 100 337 100 8509 100
Spontaneous preterm delivery 0.546
  No 736 81.1 3561 82.7 2417 81.7 275 81.6 6989 82.1  
  Yes 171 18.9 744 17.3 543 18.3 62 18.4 1520 17.9  
Cesarean delivery (n = 8420) < 0.001
  No 725 80.8 3045 71.6 1731 58.9 158 47.2 5659 67.2  
  Yes 172 19.2 1206 28.4 1206 41.1 177 52.8 2761 32.8  
Low birth weight 0.037
  No 659 72.7 3240 75.3 2147 72.5 242 71.8 6288 73.9  
  Yes 248 27.3 1065 24.7 813 27.5 95 28.2 2221 26.1