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Validity of MRI and NIRS in evaluation of low-grade cartilage lesions
| MRI | NIRS | |
| Correctly positive test | 19 | 20 |
| Correctly negative test | 15 | 27 |
| False positive test | 13 | 1 |
| False negative test | 1 | 0 |
| Sensitivity | 0.950 | 1.000 |
| Specificity | 0.536 | 0.964 |
| Positive predictive value | 0.678 | 0.714 |
| Negative predictive value | 0.937 | 1.000 |
| Likelihood ratio positive test | 2.05 | 27.7 |
| Likelihood ratio negative test | 0.093 | ∞ |
| Accuracy | 0.708 | 0.979 |
