Explain Hypothetical Breast Cancer Test.
The following table displays the results of a hypothetical Breast Cancer screening test
|
Results of a Hypothetical Screening Test for Breast Cancer Screening Test
|
Cancer confirmed
|
Cancer not confirmed
|
Total
|
|
Positive
|
133
|
982
|
1,115
|
|
Negative
|
46
|
63,649
|
63,695
|
|
Total
|
178
|
64,632
|
64,810
|
a. Compute the sensitivity of this test and explain what this means
b. Compute the specificity of this test and explain what this means
c. Compute the positive predictive value and explain what this means
d. Explain if the preclinical prevalence of breast cancer increased in the screened population would you expect the positive predictive value to increase and decrease or remain unaltered? Why?
e. Explain if the sensitivity of this test increased in the screened population would you expect the positive predictive value to increase and decrease or remain unaltered? Why?