Epidmeiology-specificity and sensitivity


Assignment:

The sensitivity and specificity of a new test are 60% and 70%, respectively. Three hundred people are screened at a clinic during the first year the new test is implemented. Assume the true prevalence of disease among clinic attendees is 10%. Set up the 2x2 table to calculate positive predictive value. (Hint: Use prevalence for determining marginal total of subjects who have the disease, TP+FN. Use this information and formulas for sensitivity and specificity to determine TP, FN, FP and TN).

Q1. What is the predictive value of a positive test?
Q2. And the number of true negative?

Your answer must be, typed, double-spaced, Times New Roman font (size 12), one-inch margins on all sides, APA format.

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