Table 1.
Clinical characteristics of subjects by age at menarche
| Age at menarche (year) | 8–12 years (n = 7770, 10.4%) |
13 years (n = 18,419, 24.6%) |
14 years (n = 22,585, 30.0%) |
15 years (n = 14,650, 19.5%) |
16–19 years (n = 11,635, 15.5%) |
P-value |
|---|---|---|---|---|---|---|
| Age, year | 28.5 ± 4.0 | 28.3 ± 4.0 | 28.3 ± 4.0 | 28.4 ± 4.2 | 28.6 ± 4.3 | < 0.001* |
| Body mass index, BMI | 21.7 ± 3.0 | 21.2 ± 3.0 | 20.9 ± 2.8 | 20.9 ± 2.8 | 20.6 ± 2.7 | < 0.001* |
| Systolic blood pressure (mmHg) | 108.3 ± 10.6 | 107.9 ± 10.6 | 107.4 ± 10.6 | 107.5 ± 10.6 | 107.3 ± 10.6 | < 0.001* |
| Diastolic blood pressure (mmHg) | 66.4 ± 7.9 | 65.9 ± 7.9 | 65.5 ± 7.9 | 65.3 ± 7.8 | 65.1 ± 7.8 | < 0.001* |
| Education (≤ 9 years) | 937(13.5%) | 3377(20.6)% | 4271(23.7)% | 3744(29.1%) | 3601(34.9%) | < 0.001* |
| Family history of diabetes | 333(4.3%) | 565(3.1%) | 544(2.4%) | 323(2.2%) | 201(1.7%) | < 0.001* |
| Family history of hypertension | 586(7.5%) | 1112(6.0%) | 1168(5.2%) | 757(5.1%) | 519(4.5%) | < 0.001* |
| HbsAg positive | 222(6.4%) | 785(8.5)% | 874(8.2%) | 672(9.1%) | 1191(9.2%) | < 0.001* |
| Glucose 0 min OGTT (mmol/L) | 4.51 ± 0.4 | 4.50 ± 0.4 | 4.49 ± 0.4 | 4.48 ± 0.39 | 4.48 ± 0.39 | < 0.001* |
| Glucose 60 min OGTT (mmol/L) | 7.91 ± 1.65 | 7.85 ± 1.69 | 7.81 ± 1.68 | 7.80 ± 1.67 | 7.80 ± 1.67 | < 0.001* |
| Glucose 120 min OGTT (mmol/L) | 6.78 ± 1.39 | 6.71 ± 1.38 | 6.68 ± 1.38 | 6.67 ± 1.37 | 6.66 ± 1.38 | < 0.001* |
*p < 0.05