Mathematics, 23.10.2019 20:00 johnmarston60
Use the following information to answer questions 4-8. suppose that 50,000 women who have never had a breast cancer diagnosis are available and willing to participate in a new screening program of computerized digital mammography. 1132 women had a positive screening test. all of these positive women had a breast biopsy and 136 were diagnosed with breast cancer. of the 48,868 who screened "negative" on the test, 24 were in fact in the detectable pre-clinical phase. this was determined by following these women and observing that all 24 were diagnosed with breast cancer within one year of the screening test.
a colleague in another city reports that the same screening test (with the same sensitivity and specificity) is achieving a predictive value positive of only 6%. what is the explanation for this?
a.
the colleague is screening a higher risk population
b.
the colleague is screening a lower risk population
c.
the colleague is screening a larger population
Answers: 2
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