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Association of age at menarche with BMI
| BMI | Age at menarche |
P | ||
|---|---|---|---|---|
| 10–13 years (n) | 14–16 years (n) | 17–19 years (n) | ||
| Under weight | 13 | 11 | 1 | <0.05* |
| Normal | 171 | 68 | 1 | |
| Preobesity | 84 | 22 | 2 | |
| Obesity | 12 | 13 | 1 | |
*Chi-square test, the result is significant at P<0.05
