logistic regression examples

logistic regression examples - LOGISTIC REGRESSION EXAMPLES...

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Unformatted text preview: LOGISTIC REGRESSION EXAMPLES • As In linear regression, logistic regression models can be used to adjust for confounding variables • Can perform essentially the same analysis as a MH analysis, adjusting for categorical variables, with logistic regression • Can adjust for continuous variables as well (this we can’t do with MH) • Can also examine whether the OR(s) associated with the variable of interest differ by the values of another variable • As in linear regression, this is done using interaction terms • Epidemiologists call this “effect modification” because the “effect” (OR) of interest is “modified” by the additional variable Age adjusted odds ratio for association between Arcus senills and CHD In STATA Adjusted for age group, the OR for CHD associated with Arcus senilis is 1.5, 95% CI 1.1, 1.9 Z Wald test for whether adjusted OR=1 We are interested, whether adjusted for age whether Arcus Senills is associated with CHD Here, likelihood ratio test whether both the...
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logistic regression examples - LOGISTIC REGRESSION EXAMPLES...

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