| MRI Result (Gold standard) | |
---|
Algorithm B | | AVN (+) | AVN (−) | Total |
Algorithm (+) for AVN | 48 | 11 | 59 |
Algorithm (−) for AVN | 35 | 8106 | 8141 |
Total | 83 | 8117 | 8200 |
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aAlgorithm B: Defined as ≥2 ICD-9 codes for AVN at least 7 days apart within 6 months of MRI; Sensitivity = 57.8% (95% CI 46.5–68.6), PPV = 81.4% (95% CI 69.1–90.3).