Table 3.
Distribution of gestational weight gain by pre-pregnancy BMI among subjects with optimal pregnancy outcomes in Changsha, Hunan, China, in 2016
| Subgroups | Gestational weight gain (kg) by percentile | IOM recommend ranges (kg) | ||||||
|---|---|---|---|---|---|---|---|---|
| 5th | 15th | 25th | 50th | 75th | 85th | 95th | ||
| Overall subjects (n = 12,564) | 5.0 | 9.0 | 11.0 | 15.0 | 18.0 | 19.0 | 22.5 | |
| IOM pre-pregnancy BMI category a | ||||||||
| Underweight (n = 2002) | 9.0 | 11.5 | 13.0 | 16.0 | 18.5 | 20.0 | 23.0 | 12.5–18.0 |
| Normal weight (n = 9308) | 5.0 | 9.0 | 11.0 | 15.0 | 17.5 | 19.0 | 22.5 | 11.5–16.0 |
| Overweight (n = 1084) | 0.0 | 4.5 | 7.5 | 12.5 | 16.0 | 18.0 | 21.5 | 7.0–11.5 |
| Obese (n = 170) | 2.5 | 5.0 | 8.0 | 13.0 | 17.5 | 20.0 | 26.0 | 5.0–9.0 |
| Asian pre-pregnancy BMI category b | ||||||||
| Underweight (n = 2002) | 9.0 | 11.5 | 13.0 | 16.0 | 18.5 | 20.0 | 23.0 | 12.5–18.0 |
| Normal weight (n = 7564) | 6.0 | 10.0 | 11.6 | 15.0 | 18.0 | 19.0 | 22.8 | 11.5–16.0 |
| Overweight (n = 1744) | 3.0 | 7.0 | 9.5 | 13.0 | 16.5 | 18.0 | 21.0 | 7.0–11.5 |
| Obese (n = 1254) | 0.4 | 5.0 | 7.5 | 12.5 | 16.0 | 18.0 | 22.5 | 5.0–9.0 |
a: IOM pre-pregnancy BMI category: underweight (BMI < 18.5), normal weight (BMI 18.5–24.9), overweight (BMI 25–29.9), obese (BMI ≥ 30);
b: Asian pre-pregnancy BMI category: underweight (BMI < 18.5), normal weight (BMI 18.5–22.9), overweight (BMI 23–24.9), obese (BMI ≥ 25)
Note: Shaded areas represent the 2009 IOM gestational weight gain ranges