| Social Class | Freq (%) | Menarche (Mean ± Std) (Yrs) | Minimum | Maximum | f-value | p-value |
| High Class | 41 (13.18) | 12.56 ± 1.51 | 9.00 | 16.00 |
|
|
| Middle Class | 63 (20.26) | 12.76 ± 1.21 | 11.00 | 17.00 | 1.270 | 0.283 |
| Low Class | 108 (34.73) | 12.90 ± 1.05 | 10.00 | 16.00 |
|
|
| Total | 211 (68.16) | 12.79 ± 1.20 | 9.00 | 17.00 |
|
|