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S05 Screening & Diagnostic Tests (FILLED IN)

# There are few if any tests that are 100 sn 100 sp but

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Unformatted text preview: o measure: a)  b)  c)  d)  Construct a 2x2 table for observed (dis)agreement Calculate % observed agreement Calculate % expected agreement (due to chance) Enter values into ﬁnal formula CalculaUng Kappa a)  Construct a 2x2 table for observed (dis)agreement # raUngs Observer #2 Observer #1 +ve - ve +ve 12 6 18 - ve 7 15 22 19 21 40 CalculaUng Kappa b) Calculate % observed agreement # raUngs Observer #2 Observer #1 +ve - ve +ve 12 6 18 - ve 7 15 22 19 21 40 = a + d / n = 12 + 15 / 40 = 27 / 40 = 67.5% CalculaUng Kappa c) Calculate % expected agreement Observer #2 Observer #1 +ve - ve +ve 12 6 18 - ve 7 15 22 19 21 40 * You will not need to remember this = [(a+b)*(a+c)/n + (c+d)*(b+d)/n] / n formula, but you will = [(18)*(19)/40 + (22)*(21)/40] / 40 need to be able to recognize it and know = (8.55 + 11.55) / 40 when to use it! = 50.25% C...
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