| Regressors | Dependent Variable: Age at Menarche | ||
| β | t | p | |
| Sister’s Age at Menarche | 0.39 | 4.9 | <0.001 |
| Years of Schooling | 0.36 | 4.2 | <0.001 |
| Hip Circumference | −0.44 | −3.2 | 0.001 |
| Waist Circumference | 0.63 | 2.9 | 0.004 |
| Abdomen Circumference | −0.40 | −2.0 | 0.03 |