HSCI 130 Final: Review Session
8 Dec 2015
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Document Summary
We need tests that are sensitive to pick up that disease and tests that are specific enough to only pick up that disease. Specificity: ideal test only identifies people with disease. A/(a+c) = [ x/( ) ] x 100. D/(b+d) = [ x/( ) ] x 100. The sensitivity of this tb test is 93. 9% This test accurately identified 93. 9% of people with tb. 98. 8% of those people without tb are given a correct diagnosis. The people lost are accounted for at the end of the day. Prevalence = # of cases/population at point in time. 7: morning of day 1 = 0/5,000. = 0: morning of day 3 = [(13+19)-(2)]/(5,000-2) = 0. 6: morning of day 5 = [(13+19+25+50)-(2-5-15)]/(5000-2-5-15- Cumulative incidence = new cases/population at risk at beginning of period: from day 1-day 2 , last 3 days = Operated on a non-profit bases by a public authority accountable to provincial or territorial government: portability.
