From: Can health care databases be used to identify incident cases of osteonecrosis?
Number of potential cases | 87 |
Age, years | 21 to 92 |
Women | 7 (8%) |
Sites (confirmed casesb) | 81 (85% of potential cases) |
   Femoral head | 71 (88%) |
   Humerus | 4 (5%) |
   Talus | 2 (2%) |
   Carpal navicular | 2 (2%) |
   Other foot/ankle | 2 (2%) |
Sites (incident casesc) | 15 |
   Femoral head | 14 (93%) |
   Humerus | 0 |
   Talus | 0 |
   Carpal navicular | 0 |
   Other foot/ankle | 1 (7%) |