Pardon if this is an easy question, I'm pretty new to SAS and logistic regression in general. Model: Response variable is dichotomous (1=ems heli transport, 0 = other form of trans). Model includes 6 explanatory variables - 3 continuous (age, injury severity, distance from hospital) and 3 categorical (race, arrival time in ED, and injury mechanism). I have found significant interaction between race (categorical) and distance from hospital (continuous), but only for one of the categories (hispanic, all of the others are nonsignificant). I don't want to stratify because race is the explanatory variable that I am most interested in. How should I treat this? Can't seem to find answers anywhere, and most of the literature has the categorical variable as dichotomous. Thanks!
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