Table 2 Characteristics of the participants
From: OPG/RANKL/RANK gene methylation among alcohol-induced femoral head necrosis in northern Chinese men
Variables | Case (n=50) | Control (n=50) | p value |
|---|---|---|---|
Sex (N) | |||
 Female | 0 | 0 |  |
 Male | 50 | 50 |  |
Age, years (mean ± SD) | 42.62 ± 10.46 | 42.76 ± 11.19 | 0.949 |
Clinical stages | |||
 Stage II | 20 |  |  |
 Stage III | 15 |  |  |
 Stage IV | 15 |  |  |