Statistics- Consider a population in which there are 500 diabetic individuals

| February 25, 2017

Consider a population in which there are 500 diabetic individuals among a total population of 10,000, i.e. a 5% prevalence. Suppose you administer a non-fasting blood sugar test with a sensitivity of 70% and a specificity of 80%.

Diabetes

Total

Blood sugar

True positives

350

False positive

??????

2250

False negatives

?????

True negatives

7600

7750

10000

Using this one test administered to a population of 10,000 people, with prevalence of disease at 5%:

a)How many people did you miss who had diabetes?

b)How many false positives are there?

c)What should we do about the 2250 persons for whom the test was positive?

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