Table 6.
Value | ESR (mm/hr) | CRP (mg/L) | Synovial fluid WBC count (per μl) | % PMN |
---|---|---|---|---|
Optimum cutoff | 43.5 | 17.75 | 1102.5 | 71.5 |
Sensitivity | 0.67 | 0.17 | 0.75 | 0.75 |
Specificity | 0.62 | 0.94 | 0.61 | 0.66 |
PPV | 0.13 | 0.20 | 0.11 | 0.12 |
NPV | 0.05 | 0.07 | 0.03 | 0.02 |
Accuracy | 0.62 | 0.88 | 0.62 | 0.66 |
Area Under Curve | 0.62 | 0.39 | 0.71 | 0.62 |