Formulas for calculating sensitivity, specificity, PPV and NPV of mTBI case selection algorithms in OSCOUR
| Medical chart: reference standard | |||
| Case | Non-case | ||
| OSCOUR database | |||
| Case | True positive (TP) | False positive (FP) | PPV=TP/(TP+FP) |
| Non-case | False negative (FN) | True negative (TN) | NPV=TN/(TN+FN) |
| Sensitivity=TP/(TP+FN) | Specificity=TN/(TN+FP) | ||
mTBI, mild traumatic brain injury; NPV, negative predictive value; PPV, positive predictive value.