Question 69 (part 2) · LEK · Diagnostic sensitivity and specificity
A specific prostate antigen (PSA) was tested in 1000 patients diagnosed with prostate cancer. A positive PSA test was obtained in 800 patients. The result obtained reflects the diagnostic accuracy of the PSA test expressed by:
- A. 80% diagnostic specificity of the test.
- B. percentage of false positive results at the level of 20%.
- C. 20% diagnostic specificity of the test.
- D. 80% diagnostic sensitivity of the test.
- E. percentage of true negative results at the level of 20%.
Hint
All 1000 tested patients actually have the disease; which measure is calculated only among the diseased?
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