Nothing
knitr::opts_chunk$set( collapse = TRUE, comment = "#>" )
library(ezcox)
library(survival) lung$ph.ecog <- factor(lung$ph.ecog) ezcox_group(lung, grp_var = "sex", covariate = "ph.ecog") ezcox_group(lung, grp_var = "sex", covariate = "ph.ecog", controls = "age") ezcox_group(lung, grp_var = "sex", covariate = "ph.ecog", controls = "age", add_all = TRUE)
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