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← Logic & PuzzlesIf a patient tests positive for a rare disease, which consequence follows for the predictive value of the test?
A)Always equals the test's sensitivity
B)Equals disease prevalence in population
C)Increases with higher test specificity✓
D)Decreases given perfect sensitivity
💡 Explanation
The predictive value of a positive test increases with specificity due to Bayes' Theorem, because a higher specificity reduces the chance of false positives, therefore increasing the probability that a positive result is a true positive, rather than arising from low specificity.
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