cox ph time dependent variable definition what type of variable is a time dependent drug __________ is the time-dependent variable in a cox phenotype model. how do you recode time dependent drug variables what is the difference between categorical and time-dependent drug variables when is the hr relative hr of a categorical time dependent variable when is a categorical time dependent variable used what is the cox ph binomial variable for drug exposures? what is the categorical variable for drugs what type of variable is categorical what is categorical time varying variable what is categorical drug exposure in a cox model? time dependent variable cox model how to code time-dependent variable time dependent drugs in cox when do you classify as a drug-dependent variable? when using cox ph do the binomial hrs change as a reference how to interpret time dependent variable what is the relationship between the time-dependent variable and the categorical variable for cdc?