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Sensitivity — FRCA Primary MCQ

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EasyStatisticsSensitivityFRCA Primary

A test identifies 90 of 100 truly difficult airways and is positive in 30 of 900 uncomplicated airways. What is the most appropriate value or measurement?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: A90%

Sensitivity is true positives divided by all affected patients. Positive likelihood ratio substantially increases post-test probability is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Type I error is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. A plausible range for the true population effect is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. 7 is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. In Primary FRCA statistics, distinguish the question being asked from related but different measures of association or diagnostic accuracy.

Reference: RCoA Primary FRCA syllabus; Bland Medical Statistics; Primary FRCA textbooks