Type of birth Type of birth Type of birth Pre-labor cesarean section Pre-labor cesarean section In-labor cesarean section In-labor cesarean section Vaginal delivery Vaginal delivery
Gender Gender Gender Male Female Male Female Male Female
Number (%) (n=7266) Number (%) (n=7266) 379 (5.2%) 355 (4.6%) 389 (5.4%) 266 (3.7%) 3132 (43.1%) 2765 (38.1%)
Birth weight Birth weight Birth weight
Mean (95% CI) Mean (95% CI) 3543 (3491-3594) 3326 (3271-3381) 3683 (3629-3737) 3571 (3508-3634) 3613 (3597-3630) 3499 (3482-3516)
Maternal BMI Maternal BMI
Mean (95% CI) Mean (95% CI) 25.5 (24.9-26.1) 25.4 (24.7-26.1) 25.4 (24.8-26.0) 25.8 (25.1-26.4) 24.0 (23.9-24.2) 24.1 (23.9-24.3)
Maternal age Maternal age Maternal age
Mean (95% CI) Mean (95% CI) 32.6 (32.2-33.1) 31.9 (31.4-32.4) 30.1 (29.6-30.6) 30.8 (30.2-31.4) 30.2 (30.0-30.4) 30.4 (30.2-30.6)
Gestational age (weeks) Gestational age (weeks) Gestational age (weeks)
37 37 52 (7.3%) 50 (7.0%) 28 (4.3%) 17 (2.6%) 155 (2.6%) 138 (2.3%)
38 38 159 (22.3%) 150 (21.0%) 49 (7.5%) 40 (6.1%) 388 (6.6%) 294 (5.0%)
39 39 139 (19.5%) 120 (16.8%) 70 (10.7%) 51 (7.8%) 695 (11.8%) 602 (10.2%)
40 40 21 (2.9%) 7 (1.0%) 91 (13.9%) 65 (9.9%) 1041 (17.7%) 935 (15.9%)
41 41 6 (0.8%) 6 (0.8%) 99 (15.1%) 64 (9.8%) 661 (11.2%) 637 (10.8%)
42 42 2 (0.3%) 2 (0.3%) 52 (7.9%) 29 (4.4%) 192 (3.3%) 159 (2.7%)
Age at sampling (days) Age at sampling (days) Age at sampling (days)
2 2 270 (37.8%) 234 (32.8%) 184 (25.4%) 132 (18.2%) 1656 (28.1%) 1405 (23.8%)
3 3 105 (14.7%) 98 (13.7%) 195 (26.9%) 125 (17.3%) 1406 (23.8%) 1307 (22.2%)
4 4 4 (0.6%) 3 (0.4%) 10 (1.4%) 9 (1.2%) 70 (1.2%) 53 (0.9%)
PROM PROM PROM 2 (0.5%) 4 (1.1%) 48 (12.3%) 39 (14.7%) 221 (7.1%) 188 (6.8%)