epidemiology Assume a population of 3000 people, of whom 675 have a disease. Of these 675...

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epidemiology Assume a population of 3000 people, of whom 675 have a disease. Of these 675...

epidemiology

Assume a population of 3000 people, of whom 675 have a disease. Of these 675 people, the test correctly identifies 450. Out Of the disease-free people, the test correctly identifies 1500.

a.Construct the contingency table

b.Calculate the sensitivity of the test

c.Calculate the specificity of the test

d.Calculate the positive predictive value

f.Calculate the negative predictive valueProvide a summary about the screening test based on the above calculation

g.Provide a summary about the screening test based on the above calculation

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Answer #1

POSTHve NEGATIVE Disease 45CP 225 (EN (Non Disease 825 (FPI 1500 (TN) sensitivity . 450 450+225 TP + FN 450 675 ³0.66 1500 15

Test is almost equally specific and sensitive but negative predictive value is quite good

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