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Nursing QUESTION #9183
Question 1
In health statistics, sensitivity of a screening test is defined as:
  • The ability of the test to correctly identify those WITHOUT the disease
  • The ability of the test to correctly identify those WITH the disease✔️
  • The proportion of positive tests that are true positives
  • The proportion of negative tests that are true negatives
Correct Answer Explanation

Key definitions in screening test evaluation:

TermFormulaMeaning
Sensitivity\\frac{\\text{True Positives}}{\\text{True Positives} + \\text{False Negatives}} \\times 100Correctly identifies those WITH disease (detects true cases)
Specificity\\frac{\\text{True Negatives}}{\\text{True Negatives} + \\text{False Positives}} \\times 100Correctly identifies those WITHOUT disease
PPV\\frac{\\text{True Positives}}{\\text{All Positives}} \\times 100Proportion of positive tests that are truly positive
NPV\\frac{\\text{True Negatives}}{\\text{All Negatives}} \\times 100Proportion of negative tests that are truly negative