Q@Q Drill Time IV - cardio69

[ArchivalUser]

A new stool test for Clostridium difficile yields positive results 10% of uninfected patients and in 80% of infected patients. Prevalence of Clostridium difficile infection in the population is 10%. What is the probability that a patient who tests positive with the new test is infected with Clostridium difficile?

a) 75%
b) 54%
c) 47%
d) 33%
e) 25%


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[ArchivalUser]

________________________________Time's UP>_________________________________________

[ArchivalUser]

CCCCC

PPV= TP/TP+NP=80/80+90=47%

thanks

[ArchivalUser]

(:

[ArchivalUser]

Please explain

[ArchivalUser]

Got it