Table 2 Univariate analysis of influential factors of macrosomia in the first and second parturient groups
Variables | Pregnant women in their first pregnancy (n, %, mean ± SD) | Pregnant women in their second pregnancy (n, %, mean ± SD) | χ2/t | p value |
|---|---|---|---|---|
Fetal macrosomia | ||||
 Yes | 79 (7.2) | 36(7.1) |  |  |
 No | 1015 (92.8) | 468 (92.9) | 0.003 | 0.955 |
Maternal age (years) | 29.21±3.51 | 28.80±3.39 | 2.207 | 0.027* |
Maternal height (m) | 1.61±0.05 | 1.61±0.05 | 1.362 | 0.174 |
Delivery weight (kg) | 60.68±8.72 | 62.12±8.38 | − 3.109 | 0.002** |
Maternal BMI (kg/m2) | 23.31±3.21 | 23.98±3.08 | − 3.871 | 0.000*** |
Gestational diabetes mellitus | ||||
 Yes | 39 (3.6) | 18 (3.6) |  |  |
 No | 1055 (96.4) | 486 (96.4) | 0.000 | 0.995 |
Gestational hypertension | ||||
 Yes | 39 (3.6) | 33 (6.5) |  |  |
 No | 1055 (96.4) | 471 (93.5) | 7.134 | 0.008 |
Physical activity time (daily) | ||||
 < 30 min | 873 (79.8) | 409 (81.2) |  |  |
 ≥ 30 min | 221 (20.2) | 95 (18.8) | 0.397 | 0.528 |
Fetal birth weight (g) | 3334.63±620.82 | 3448.73±758.73 | − 3.174 | 0.002** |
Fetal gender | ||||
 Male | 587 (53.7) | 268 (53.2) |  |  |
 Female | 507 (46.3) | 236 (46.8) | 0.032 | 0.858 |