Answered: Calculate the number of true positives…

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Calculate the number of true positives Calculate the number of false positives

Basic Clinical Lab Competencies for Respiratory Care: An Integrated Approach

5th Edition

ISBN:9781285244662

Author:White

Publisher:White

Chapter7: Phlebotomy

Section: Chapter Questions

Problem 6SEPT

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Question

A test is used to screen people for hepatitis B. The sensitivity of the test is 95% and the specificity of the test is 90%. Assume that the total number of persons being tested for hepatitis B is 50,000. Assume that the true prevalence of hepatitis B in the population is 100 per 50,000.

Calculate the number of true positives
Calculate the number of false positives

Disease present
Disease absent
Positive test
a= true positive
b= false positive
Negative test
c= false negative
d= true negative

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