Table 2 Performance of radiographically detectable dvOPs with regard to diagnostic testing of HOA. HOA was determined by either radiographic (Kellgren/Lawrence) or histological (Mankin) scoring systems. PPV, positive predictive value; NPV, negative predictive value
n | OA according to Kellgren/Lawrence | OA according to Mankin |
|---|---|---|
dvOPs in DIP | ||
 Sensitivity | 81.82% (59.72 to 94.81%) | 69.23% (48.21 to 85.67%) |
 Specificity | 100% (78.20 to 100%) | 100% (71.51 to 100.00%) |
 PPV | 100% | 100% |
 NPV | 78.95% (60.71 to 90.10%) | 57.89% (43.58 to 70.99%) |
dvOPs in PIP | ||
 Sensitivity | 54.55 % (23.38 to 83.25%) | 25.00% (9.77 to 46.71%) |
 Specificity | 100% (87.66 to 100%) | 100% (78.20 to 100%) |
 PPV | 100% | 100% |
 NPV | 84.85% (74.56 to 91.45%) | 45.45% (39.81 to 51.22%) |