試題詳解

21. 下列有關進行 Diagnostic block 預期 Diagnostic confidence 之 specificity and sensitivity 計算 公式，下列選項何者是錯誤？
(A) posttest odds = pretest odds × positive likelihood ratio
(B) positive likelihood ratio = sensitivity / (1 − specificity)
(C) pretest odds = prevalence / (1 − prevalence)
(D) diagnostic confidence = [(posttest odds) / (1 −posttest odds)] × 100%
(E)若 specificity 是 65%, 以及 prevalence 是 40%, 則 diagnostic confidence of positive comparative blocks 大約是 66%