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. One thousand one hundred thirty-two (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.
-What is the prevalence of the detectable pre-clinical phase of breast cancer in this population?

Question

Quizplus · Accepted Answer

The prevalence of the detectable pre-clinical phase of breast cancer is calculated by adding the true positives (136) and the false negatives (24), which gives 160 cases out of 50,000 women.

Suppose That 50,000 Women Who Have Never Had a Breast