Astudy was perform in the albuquerque, new mexico metropolitan area to evaluate the diagnostic accuracy of prostate specific antigen (psa) testing as a screening tool for detecting prostate cancer in community practice. subjects were 2,620 men 40 years and older undergoing (psa) testing and prostate biopsy. a total of 1,932 men tested positive with the initial psa testing and among them cancer was detected in 800 subjects with a subsequent prostate biopsy. in addition, 130 cases of prostate cancer were detected among men who screened negative with the initial psa test.

a) using the information above, create a 2x2 table to assess the accuracy of the test.
b) calculate and interpret the sensitivity of the psa test.
c) what will be the specificity of this screening test? calculate and interpret.
d) calculate and interpret the predictive value positive of the psa test.
e) calculate and interpret the predictive value negative of the psa test