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Specificity Calculator

Specificity Calculator
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Specificity Calculator

Diagnostic Test Performance Metrics

Calculate Specificity & Test Metrics

📊 What is Specificity?

Specificity measures the ability of a diagnostic test to correctly identify people without the disease (true negative rate).

Formula: Specificity = TN / (TN + FP) × 100%

A test with high specificity produces few false positives and is good at ruling in a disease when positive.

🔢 Confusion Matrix Reference

Test ResultsActual Condition
Disease PresentDisease Absent
Test ResultPositiveTrue Positive (TP)False Positive (FP)
NegativeFalse Negative (FN)True Negative (TN)
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