Table I.
Distribution of study cases according to etiology
| Cause of AVN | No. of cases | Percentage |
|---|---|---|
| 1. Alcoholism | 19 | 47.5 |
| 2. Corticosteroid abuse | 8 | 20.0 |
| 3. Post-traumatic | 7 | 17.5 |
| 4. Idiopathic | 6 | 15.0 |
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