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Full Version: I stoled a q of Epidemio - keshkala
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In a lab test, PSA > 4 is abnormal, and that test's
Sensitivity = 80
Specificity =90
Recent studies show that 10% of that age group have prostate cancer.
A Patient has PSA of 7.
What is the likelihood ( in percentage) that he has CA prostrate?

13
25
36
47
58
69
72
81
ok. answer is 47
how did u get that keshkala