TABLE 1

Association of cesarean section with pregnancy and birth factors

nCesarean section [n (%)]P*
Maternal type 1 diabetes10−23
 Yes917433 (47.2)
 No588127 (21.6)
Singleton birth0.016
 Yes1,468537 (36.6)
 No3723 (62.2)
Premature (<37 weeks’ gestation)10−15
 Yes191123 (64.4)
 No1,314437 (33.3)
Firstborn child5 × 10−5
 Yes857364 (42.5)
 No624187 (30.0)
Maternal smoking during pregnancy0.16
 Yes16373 (44.8)
 No1,342487 (36.3)
Maternal age (years)1.0
 <28.1471172 (36.5)
 28.2–31.6511189 (37.0)
 >31.6506193 (38.1)
Birth wt (g)0.048
 <3,450700281 (40.0)
 ≥3,450727241 (33.2)
Breast feeding (months)4 × 10−10
 ≤3720330 (45.8)
 >3737215 (29.2)
  • *Bonferroni-corrected values.