title: Computing measures of explained variation for logistic regression models.
abstract: The proportion of explained variation (R2) is frequently used in the general linear model but in logistic regression no standard definition of R2 exists. We present a SAS macro which calculates two R2-measures based on Pearson and on deviance residuals for logistic regression. Also, adjusted versions for both measures are given, which should prevent the inflation of R2 in small samples.
authors: Department of Medical Computer Sciences, University of Vienna, Austria. Martina.Mittlboeck@AKH-Wien.AC.AT
authors: M
authors: M
authors: Mittlböck
authors: M
authors: M
authors: Schemper
mesh_terms: D003198:Computer Simulation; D004305:Dose-Response Relationship, Drug; D016015:Logistic Models; D012984:Software