Table 1.
Total GWG in Chinese women with twin pregnancies by different pre-pregnancy BMI.
| Pre-pregnancy BMI | China BMI Standard (kg/m2) | No. of Subjects (%) | Total GWG (kg), mean ± SD | 25th Percentile (kg) | 75th Percentile (kg) | 10th and 90th Percentiles (kg) |
|---|---|---|---|---|---|---|
| Underweight | <18.5 | 854 (12.33) | 22.82 ± 7.44 | 18 | 26 | 15–31 |
| Normal | 18.5–23.9 | 5225 (75.45) | 20.44 ± 8.15 | 15 | 25 | 11–31 |
| Overweight | 24–27.9 | 715 (10.32) | 16.58 ± 7.05 | 12 | 21 | 7–25 |
| Obese | ≥28 | 131 (1.89) | 14.79 ± 6.90 | 9 | 20 | 5–24 |
Abbreviations: GWG, gestational weight gain; BMI, body mass index; SD, standard deviation.