Table 1.
Basic characteristics of the participants (n = 5529).
| Variables | All participants |
|---|---|
| Maternal age (median[IQR],Years) | 31[28,35] |
| Pre-pregnancy Weight (median[IQR],Kg) | 54[49.5,60] |
| Body mass index category (N,%) | |
| Underweight | 686 (12.41) |
| Normal weight | 3767 (68.13) |
| Overweight | 1000(18.09) |
| Obesity | 76 (1.37) |
| Gravidity | |
| 1 | 1972 (35.67) |
| 2 | 1679 (30.37) |
| ≥3 | 1878 (33.97) |
| Parity (N,%) | |
| Primiparity | 2876 (52.02) |
| Multiparity | 2653 (47.98) |
| Gestational age at delivery (median[IQR],Weeks) | 39[38,40] |
| Gestational weight gain category by Chinese guideline (N,%) | |
| Below recommended | 815 (14.74) |
| As recommended | 2856 (51.65) |
| Above recommended | 1858 (33.60) |
| Birth weight (median[IQR],g) | 3300[3032.5,3570] |
| Glucose tolerance status (N,%) | |
| One abnormal item | 3292 (59.54) |
| Two abnormal items | 1732 (31.33) |
| Three abnormal items | 505 (9.13) |
| Model of delivery (N,%) | |
| Vaginal birth | 3463 (62.63) |
| Cesarean delivery | 2066 (37.37) |
| Infant sex (N,%) | |
| Boy | 2981 (53.92) |
| Girl | 2548 (46.08) |