Re: how to solve this epidemiology problem

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: find the positive predictive value from sensitivity and specificity and i found it around 88% and as the prevalence is also high the PPV should stand around 88%, so the last answer may be the best one to bet on.: a 55 yr old man visits his gp with urinary infrequency.o/e there is a 1 cm nodule in the prostrate.the pros.spec.antigen test is ordered.normally psa greater than 4ng/ml is abnormal.the test is 80% sensitive and 90% specific.a recently published epidemiological article found that 10% of the men of this age has prostrate cancer.the result on the patient is 7ng/ml.what is the best estimate of the likelyhood this man has prostrate cancer.

A 13%

B 25%

C 36%

D 47%

E 58%

F 69%

G 72%

H 81%



thanks in advance

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