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The definitions of sensitivity and specificity.
| Condition | ||
|---|---|---|
| Test outcome | True positive (TP) | False positive (FP) |
| False negative (FN) | True negative (TN) | |
| Sensitivity = TP/(TP + FN) | Specificity = TN/(FP + TN) | |
TP, correctly diagnosed patients; FP, incorrectly identified patients; TN, correctly diagnosed controls; FN, incorrectly identified controls.
