03-08-2007, 05:04 PM
A standard urine test, used to detect the presence of cocaine, is determined to have a sensitivity of 97%, a specificity of 94%, a positive predictive value of 90%, and a negative predictive value of 95%. These values are based on the use of the screening test in the year 2003. Recent data suggest that the use of cocaine in all age groups has declined since that year.
This change in the use of cocaine will most likely have which of the following impacts on the results of the screening test?
A. Decrease the sensitivity
B. Decrease the specificity
C. Increase the negative predictive value
D. Increase the positive predictive value
E. Increase the sensitivity
F. Increase the specificity
This change in the use of cocaine will most likely have which of the following impacts on the results of the screening test?
A. Decrease the sensitivity
B. Decrease the specificity
C. Increase the negative predictive value
D. Increase the positive predictive value
E. Increase the sensitivity
F. Increase the specificity