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Screening Tests
A cohort of 10,000 women are screened for breast cancer via mammography. A total of 500 women have a positive mammogram. Upon further study of these 500 only 85 are found to actually have the disease (true positives) An additional 15 women are found to have the disease but have had a negative mammogram.
A. Properly set up and label your table and fill in all missing cells.
B. Calculate the sensitivity of the test.
C. Calculate the specificity of the test.
D. Calculate the positive predictive value.
E. Calculate the negative predictive value.
F. Calculate the prevalence of the disease.
G. Explain what would happen to the sensitivity, specificity, positive predictive value, and the negative predictive value if the prevalence of the disease were to increase.
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