In a population of 1,000 people, 100 have a disease. A test is positive in 95 people with the disease and 100 people without the disease. What is the sensitivity, specificity, and positive predictive value of this test?
In a population of 1,000 people, 100 have a disease. A test is positive in 95 people with the disease and 100 people without the disease. What is the sensitivity, specificity, and positive predictive value of this test?
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April 30, 2016 at 11:56 pm
Sensitivity: positivity in disease = 95/100 = 95%. Specificity: negativity in health = 800/900 = 89%. PPV: disease/all pos = 95/195 = 49%
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