A test for hepatitis C is performed for 200 patients with biopsy proven disease and 200 patients known to be free of the disease. The test shows positive results on 180 of the patients with the disease, and negative results on 150 of the patients without the disease. Among those tested, this test therefore:

Question

A test for hepatitis C is performed for 200 patients with biopsy­ proven disease and 200 patients known to be free of the disease. The test shows positive results on 180 of the patients with the disease, and negative results on 150 of the patients without the disease. Among those tested, this test therefore:

Accepted Answer

Has a positive predictive value of 90%

Answer

Has a negative predictive value of 75%

Answer

Has a sensitivity of 90%

Answer

Has a specificity  of 82.5%

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