A physical examination was used to screen for breast cancer in 2,500 women with biopsyproven adenocarcinoma of the breast and in 5,000 ages-and race matched control women.
The results of the physical examination were positive (i. e., a mass was palpated) in 1,800
cases and in control woman, all of whom showed no evidence of cancer at biopsy.
Calculate:
a. The positive predictive value
b. The negative predictive value