Please show step by step by hand calculation Thank you 8. In a screening study o

Question

Please show step by step by hand calculation

Thank you

8. In a screening study of TB, 50 out of 500 people had"+" test results. Assume the screening test missed 5 out of 30 true TB patients. Filling the table and answer the questions. TB confirmation total 50 % Screening total 30 500 Calculate the following based on the table. a) The sensitivity of the screening test b) The specificity of the screening test c) The predictive value positive d) The predictive value negative e) The disease prevalence

Explanation / Answer

a. Complete the table.

a. Sensitivity of screening=25/30*100=83.33%

b. Specificity of test=445/470*100=94.68%

c. Positive predictive value=25/50*100=50%

d. Negative predictive value=445/450*100=98.89%

TB confirmation + - Screening + 25 25 50 - 5 445 450 30 470 500

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