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Contingency table—sensitivity, specificity, positive-predictive value (PPV) and negative-predictive value (NPV) of cranial CT (CCT) compared with MRI
| CCT findings | MRI positive | MRI negative | NPV and PPV |
|---|---|---|---|
| CCT positive | 5 (12) | 7 (17) | PPV 42% |
| CCT negative | 0 (0) | 29 (71) | NPV 100% |
| Sensitivity 100% | Specificity 81% |
Data are number (%) of patients.
