問題詳情
79.利用10個豬瘟病毒確診陽性檢體及10個確診陰性檢體依ELISA之OD讀值結果如下表。下列何者為利用OD=0.05 （A）、0.45 （B）、0.85（C）、1.15 （D） 及1.8 （E）共5個判定值 (cut-offpoint)畫出的ROC曲線(receiver operating characteristic curve )?
(A)
(B)
(C)
(D)
80.承上題,在5個判定值中,何者最佳及其原因為何?
(A)OD=0.05,因敏感性為100%
(B)OD=1.8,因特異性為100%
(C)OD=1.15 ,因AUC ( area under the curve)最大
(D)OD=0.85,因最靠近左上角,其切線斜率趨近於1
參考答案
答案：D
難度：適中0.4
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