2～5岁儿童年龄别BMI的标准差数值(kg/㎡)
| 年龄 | 男童 | 女童 | ||||
| +1SD | +2SD | +3SD | +1SD | +2SD | +3SD | |
| 2岁 | 17.4 | 19.0 | 20.9 | 17.0 | 18.6 | 20.4 |
| 2岁3月 | 17.2 | 18.8 | 20.7 | 16.9 | 18.4 | 20.2 |
| 2岁6月 | 17.0 | 18.6 | 20.4 | 16.7 | 18.2 | 20.1 |
| 2岁9月 | 16.9 | 18.4 | 20.3 | 16.6 | 18.1 | 20.0 |
| 3岁 | 16.8 | 18.3 | 20.1 | 16.5 | 18.1 | 19.9 |
| 3岁3月 | 16.7 | 18.2 | 20.1 | 16.5 | 18.0 | 19.9 |
| 3岁6月 | 16.6 | 18.1 | 20.0 | 16.5 | 18.0 | 19.9 |
| 3岁9月 | 16.6 | 18.1 | 20.0 | 16.4 | 18.0 | 20.0 |
| 4岁 | 16.6 | 18.1 | 20.1 | 16.4 | 18.0 | 20.0 |
| 4岁3月 | 16.6 | 18.2 | 20.2 | 16.4 | 18.0 | 20.1 |
| 4岁6月 | 16.6 | 18.2 | 20.3 | 16.4 | 18.1 | 20.2 |
| 4岁9月 | 16.6 | 18.3 | 20.5 | 16.4 | 18.1 | 20.3 |
| 5岁 | 16.7 | 18.4 | 20.7 | 16.4 | 18.2 | 20.5 |
| 5岁3月 | 16.7 | 18.6 | 21.0 | 16.4 | 18.3 | 20.6 |
| 5岁6月 | 16.8 | 18.7 | 21.4 | 16.5 | 18.4 | 20.8 |
| 5岁9月 | 16.9 | 18.9 | 21.7 | 16.5 | 18.4 | 21.0 |
| 注：年龄为整月或整岁。 | ||||||
引自：《7岁以下儿童生长标准》(WS/T423)。
6～17岁儿童青少年超重与肥胖以BMI进行判定，凡BMI大于或等于相应性别、年龄组“超重”界值点且小于“肥胖” 界值点者为超重;凡BMI大于或等于相应性别、年龄组“肥胖”界值点者为肥胖，详见表如下：
