Dear all, I would like to use some continuous variables to see if I can predict a certain behavior (such as "fallers-people who had a history of falls" versus "non-fallers"). My dependent variable is "Group" (0=non-fallers, 1=fallers). For the independent variables, I use couple of continuous measures. Since the absolute values of my independent variables would affect the "unit odds ratio" (although the "range" odds ratio would be the same), how should I choose the "unit" of the independent variables (such as "meters versus centi-meters")? For example, If I input my data in centi-meters, I would have the unit odds ratio as 0.6. But if I input my data in meters, then I would have the unit odds ratio as 0.002. Also, if I would like to compare the unit odds ratio among different independent variables, how should I do to make it fair since their absolute values are very different due to different scales/units? Moreover, if the distribution of a certain independent variables is not normal, should I transform my data first (such as log transform) before running the logistic regression? thank you in advance!
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