Table 1C.
Maternal characteristics of the study population according to the ACOG classification
| Underweight | Normal weight | Overweight | Obese | |||
|---|---|---|---|---|---|---|
| Class I | Class II | Class III | ||||
| Prepregnancy BMI (kg/m2) | <18.5 | 18.5 to 24.9 | 25 to 29.9 | 30 to 34.9 | 35 to 39.9 | ≥40 |
| n = 1,159 (19.1%) | n = 4,239 (69.9%) | n = 474 (7.8%) | n = 141 (2.3%) | n = 41 (0.6%) | n = 12 (0.2%) | |
| Maternal age (y) | 30.8 ± 4.9** | 31.9 ± 4.99 | 32.7 ± 5.1** | 32.7 ± 4.7 | 32.2 ± 4.1 | 32.4 ± 5.4 |
| Primiparous rate (%) | 57.1** | 50.1 | 37.7** | 46.1 | 51.2 | 50 |
| Maternal height (cm) | 158.2 ± 5.4 | 157.9 ± 5.5 | 157.4 ± 5.8 | 157.1 ± 5.1 | 157.3 ± 5.8 | 154.6 ± 7.4 |
| Total gestational weight gain (kg) | 10.5 ± 4.0 | 10.7 ± 11.1 | 8.3 ± 5.9** | 6.5 ± 6.6** | 1.8 ± 6.6** | 2.8 ± 6.5* |
| Gestational week at delivery | 38.3 ± 2.1 | 38.4 ± 2.0 | 38.1 ± 2.4* | 37.7 ± 3.0** | 37.8 ± 2.8 | 37.9 ± 2.3 |
*p <0.05 vs Normal weight; **p <0.01 vs Normal weight.