Sensitivity, Specificity, Accuracy, and Positive and Negative Predictive Values Using MRI as Reference Standard
| Predictive value | |||||
| Parameter | Sensitivity | Specificity | Accuracy | Positive | Negative |
| ESR | 52% | 56.8% | 58.1% | 75.3% | 32.1% |
| CRP | 17.1% | 72.7% | 32.9% | 61.3% | 25.8% |
| BASDAI | 69.4% | 88.6% | 77% | 93.6% | 53.4% |
| 99mTc-MDP scan | 42% | 80% | 53% | 85% | 36% |
| SPECT/CT scan | 90% | 80% | 87% | 92% | 75% |