Table 5 Comparison of values of weight gain in normal-weight women established by the percentile method for different measures
From: Gestational weight gain charts for twin pregnancies in Southeast China
GWG measure | 25th | 75th | Interquartile range | Corresponding ranges (kg) |
|---|---|---|---|---|
Total GWG | 15.3 | 22.5 | 15.3~22.5 | 15.3~22.5 |
Z-score Aa | 0.61 | 1.63 | 0.61~1.63 | 15.1~23.0 |
Z-score Bb | −0.83 | 0.34 | −0.83~0.34 | 19.6~25.5 |
IOM recommendation | 16.8- | 24.5 | 16.8–24.5 | 16.8–24.5 |