In addition to categorizing each person as \"+\"or \"-\" based on the PSA test,

Question

In addition to categorizing each person as "+"or "-" based on the PSA test, researchers recorded the actual PSA value for each subject and explored using different cutoff values for diagnosing cancer. The summary table below shows what the sensitivity and specificity of the PSA test would have been if PSA values lower than 4.0 ng/ml had been used to separate positive and negative tests. Use this table to answer the questions that follow PSA Cutoff Level (ng/ml) Sensitivity 0 0.6 1.1 2.1 93 75 37 Specificity 0 02 73 92

Explanation / Answer

Result:

Part1

Sensitivity for 0.6ng/ml is 0.93

Answer: 93%

Part 2

Healthy men test positive = 100% - 93%

= 7%

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