Better test--which stays the same?

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Prep4USMLE Forum » USMLE Step 2 CK Forum » Internal Medicine Forum

Better test--which stays the same?

Author

6 Posts

lucci
Forum Senior

Topics: 35
Posts: 52

10/12/06 - 03:37 PM

A new test for Cercical Cancer allows better detection.Statistically all can be modified, EXCEPT:

A. Prevalence

B. Incidence

C.PPV

D. NPV

E. Survival rate

Thanks.

saadtazjam
Forum Elite

Topics: 9
Posts: 160

10/12/06 - 03:59 PM

lucci
Forum Senior

Topics: 35
Posts: 52

10/12/06 - 04:35 PM

Can you tell me why prevalence, please?

saadtazjam
Forum Elite

Topics: 9
Posts: 160

10/12/06 - 10:59 PM

Prevalence is number of existing disease and incidence is the number of new cases,hence if a new test is developed which can detect the disease but has nothing to do with existing disease then your prevalance is unchanged.

Renegade
Forum Elite

Topics: 18
Posts: 171

10/13/06 - 07:54 AM

Past prevalence may not be, but from now on (since it alters incidence), it certainly will...

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lucci
Forum Senior

Topics: 35
Posts: 52

10/13/06 - 04:18 PM

Thanks.

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