Sensitivity | Specificity | |
Erythrocyte sedimentation rate | ||
≥20 mm/hour | 0.78 | 0.67 |
≥50 mm/hour | 0.56 | 0.97 |
≥100 mm/hour | 0.22 | 0.996 |
Anemia (hematocrit <40% for men or <38% for women) | 0.54 | 0.86 |
Hematocrit <30 | 0.09 | 0.994 |
White blood cell count ≥12,000 | 0.22 | 0.94 |