12-13-2016, 01:44 AM
A new blood test to detect prostate cancer is evaluated in 300 male volunteers. A needle biopsy of the prostate gland is done on all men with serum prostate-specific antigen concentrations greater than 5 ng/mL (N less than 4). One hundred men undergo biopsy procedures; 90 are found to have prostate cancer, and five are found to have chronic prostatitis.
Which of the following is necessary to calculate the sensitivity of this test?
(A) Incidence of chronic prostatitis in the general population
(B) Number of men with test results greater than 5 ng/mL and a normal biopsy specimen
© Prevalence of chronic prostatitis in the general population
(D) Prostate biopsies of men with test results equal to or below 5 ng/mL
Which of the following is necessary to calculate the sensitivity of this test?
(A) Incidence of chronic prostatitis in the general population
(B) Number of men with test results greater than 5 ng/mL and a normal biopsy specimen
© Prevalence of chronic prostatitis in the general population
(D) Prostate biopsies of men with test results equal to or below 5 ng/mL