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Sensitivity, specificity, positive predictive value (PPV) and negative predict value (NPV) of the MRI, based on positive or negative diagnoses only
| Definitive outcome | Sensitivity | Specificity | PPV | NPV | ||
|---|---|---|---|---|---|---|
| Appendix + | Appendix − | |||||
| MRI | ||||||
| Appendix + | 25 | 0 | ||||
| Appendix − | 3 | 75 | 89 % | 100 % | 100 % | 96 % |
| Equivocal | 1 | 8 | ||||
| Total | 29 | 83 | ||||
