Table 1.
Maternal and infant characteristics1.
| Characteristics | Total (n = 200) | |
|---|---|---|
| Mean | SD | |
| Maternal characteristics | ||
| Age, y | 30.0 | 5.4 |
| BMI, kg/m2 | 22.8 | 2.8 |
| City, n (%) | ||
| Beijing | 27 (13.5%) | |
| Chengdu | 29 (14.5%) | |
| Guangzhou | 25 (12.5%) | |
| Jinhua | 30 (15.0%) | |
| Lanzhou | 36 (18.0%) | |
| Weihai | 20 (10.0%) | |
| Zhengzhou | 33 (16.5%) | |
| Infant characteristics | ||
| Sex, n (%) | ||
| Male | 114 (57.0%) | |
| Female | 86 (43.0%) | |
| Birth weight, g | 3361.0 | 659.1 |
| Birth length, cm | 50.1 | 2.4 |
| Age, n (%) | ||
| 2 months | 106 (53.0%) | |
| 6 months | 94 (47.0%) | |
| Z score | ||
| WAZ | 0.57 | 1.73 |
| LAZ | 0.14 | 2.09 |
| WLZ | 0.90 | 2.50 |
1WAZ, weight-for-age z score, LAZ, length-for-age z score, WLZ, weight-for-length z score.