Table 2 Main results for the 87 identified potential cases of osteonecrosis
From: Can health care databases be used to identify incident cases of osteonecrosis?
Definition using administrative data | Number of records meeting definition (percentage) | PPV for confirmed ON (prevalent and incident) | PPV for incident ON | Number of records needing review for every 1,000 with any ON code | Number of incident ON cases expected after review |
|---|---|---|---|---|---|
At least 1 ON code | 87 (100%) | 90% | 17% | 1,000 | 170 |
More than 1 ON code | 85 (98%) | 92% | 18% | 980 | 176 |
At least 1 inpatient ON code | 47 (54%) | 100% | 23% | 540 | 124 |
(At least 1 ON code) and (no prior codes for OA) | 25 (29%) | 76% | 24% | 290 | 70 |
(At least 1 inpatient ON code) and (no prior codes for OA) | 13 (15%) | 100% | 46% | 150 | 69 |