cox regression with interaction how to interpret how do you interpret a cox regression model cox regression with interaction cox regression with interaction giving na values how to interpret? what is the na value for cox regression why use cox regression in aNOVA to test a covariate's p value? how to interpret cox regression results how to interpret cox regression what is cox regression with interaction which is the cox regression with interaction what type of regression gives a na value why is m1 coxph used when using cox regression what are the relationships of the covariates what is the cox regression model with interaction how to interpret a cox regression which of the following is the na of an interaction model with the covariates in cox regression test? what is m.all coxph in aNOVA what is the na of a cox regression which model has the interaction of all covariates cox regression with interaction giving na values, how to interpret?