Table 1.
Characteristics of the individuals in controls and steroid-induced ONFH patients.
| Variables | Cases (n=286) | Controls (n=309) | p value |
|---|---|---|---|
| N (%) | N (%) | ||
| Age, years | |||
| Mean ± SD | 41.83 ± 13.12 | 48.78 ± 8.30 | < 0.001a |
| ≤48 | 203 (71.0) | 170 (55.0) | |
| >48 | 83 (29.0) | 139 (45.0) | |
| Gender | 0.412b | ||
| female | 113 (39.5) | 112 (36.2) | |
| male | 173 (60.5) | 197 (63.8) | |
| Clinical stages | |||
| Stage II | 64 (22.4) | ||
| Stage III | 126 (44.1) | ||
| Stage IV | 96 (33.6) | ||
| Hip lesions | |||
| Unilateral | 83 (29.0) | ||
| Bilateral | 203 (71.0) | ||
| Course, months | |||
| >12 | 157 (45.1) | ||
| ≤12 | 129 (54.9) |
P < 0.05 indicates statistical significance.
a Independent samples t test.
b Two-sided Chi-squared test.