Table 1 Baseline characteristics of study participants, overall and by maternal prepartum CSI status
|  | Total (n = 5476) | Maternal prepartum CSIa | ||
|---|---|---|---|---|
No (n = 5082) | Yes (n = 394) | P b | ||
Maternal age, mean (SD) | 30.4 (4.0) | 30.5 (4.0) | 29.9 (3.9) | 0.006 |
Parity category, n (%) | ||||
 Nulliparous | 2512 (45.9) | 2303 (45.3) | 209 (53.0) |  |
 Primiparous | 2819 (51.5) | 2645 (52.0) | 174 (44.2) |  |
 Multiparous | 145 (2.6) | 134 (2.7) | 11 (2.8) | 0.010 |
pBMI (kg/m2), mean (SD) | 20.4 (2.5) | 20.4 (2.5) | 21.0 (3.0) |  < 0.001 |
pBMI category, n (%) | ||||
  < 18.5 kg/m2 | 1193 (21.8) | 1123 (22.1) | 70 (17.8) |  |
 18.5 – 24.9 kg/m2 | 3986 (72.8) | 3696 (72.7) | 290 (73.6) |  |
  ≥ 25 kg/m2 | 297 (5.4) | 263 (5.2) | 34 (8.6) |  < 0.001 |
tGWG (kg), mean (SD) | 13.9 (4.0) | 13.8 (3.9) | 14.0 (4.2) | 0.664 |
tGWG tertiles, n (%) | ||||
  < 12 kg | 1579 (28.8) | 1461 (28.8) | 118 (30.0) |  |
 12 – 14.9 kg | 1705 (31.2) | 1602 (31.5) | 103 (26.1) |  |
  ≥ 15 kg | 2192 (40.0) | 2019 (39.7) | 173 (43.9) | 0.075 |
Gestational length (weeks), mean (SD) | 39.4 (0.9) | 39.4 (0.9) | 39.5 (0.9) | 0.528 |