cutoff value - psych80

[ArchivalUser]

The American Diabetes Association (ADA) recently lowered the cutoff value for fasting glucose used in diagnosing diabetes mellitus from 140 mg/dL to 126 mg/dL. This reference interval change would be expected to produce which of the following alterations?

A. Decrease the test's sensitivity
B. Increase the test's false negative rate
C. Increase the test's negative predictive value
D. Increase the test's positive predictive value
E. Increase the test's specificity

[ArchivalUser]

so it will be more people diagnosed with DM. More False positive = increase PPV .. D??

[ArchivalUser]

think again my friend

[ArchivalUser]

C.?

[ArchivalUser]

yeah.. apgy99 is correct. increasing FP = means less closer to dx --> increase NPV CC

[ArchivalUser]

cc

[ArchivalUser]

decreased cutoff value .. pt still negative .. high probability of being negative

[ArchivalUser]

lower cutoff =

increase sensitivity , lower specificity

also increase NPV , lower NPV

[ArchivalUser]

agnosia : i think you want to say increase NPV, lower PPV..

Great summarization!

[ArchivalUser]

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