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Old 05-20-2014
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Default UW EPID. question

uw Q ID2136 [383102]

please help to understand..epid question about PPV nad NPV...they shows grraph with A nd B point..how will change PPV in u move Bto A (B disease A healthy point)
i know this graph from step 1 i knew how to answer but i dont now why my answer is differ then theirs..and all my notes from step 1 says same as me..
for me PPV should increase but theY r saying PPV decrease
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Old 05-20-2014
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Should not ppv decrease? Because you are decreasing specificity of test by moving the cut off point lower so more false positive would be there?
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