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Biostatistics & Research · single question

Which formula correctly represents diagnostic test SENSITIVITY?

  1. TN / (TN + FP)
  2. TP / (TP + FP)
  3. TP / (TP + FN)
  4. TN / (TN + FN)
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Correct answer: C. TP / (TP + FN)

Sensitivity = TP / (TP + FN). Measures how well a test detects TRUE disease (true positive rate). SnNout: Sensitive test, Negative result, rules Out disease. Specificity = TN / (TN + FP) = rules in disease (SpPin). PPV = TP/(TP+FP). NPV = TN/(TN+FN).

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