Biostatistics & Research · single question
What does 'specificity' of a diagnostic test refer to?
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Correct answer: A. Ability to correctly identify healthy patients as negative
Specificity = the test's ability to correctly identify those who do NOT have disease (true negative rate). Formula: TN/(TN+FP).
- A. ✅ CORRECT – Specificity = correctly identifying healthy (disease-free) people as negative.
- B. ❌ Reproducibility describes precision/reliability.
- C. ❌ Proportion of true positives among all positives is Positive Predictive Value (PPV).
- D. ❌ Detecting disease in sick patients is sensitivity (TPR).
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