Cox regression model

We may want to quantify the effect size of a single variable , Or include multiple variables in the regression model to explain the effects of multiple variables .

We can use the function to fit the regression model of survival data , This function is on the left coxph Accept an object , The standard syntax with the regression formula on the right .SurvR

coxph(Surv(time, status) ~ sex, data = lung)
## Call:
## coxph(formula = Surv(time, status) ~ sex, data = lung)
## 
## coef exp(coef) se(coef) z p
## sex -0.5310 0.5880 0.1672 -3.176 0.00149
## 
## Likelihood ratio test=10.63 on 1 df, p=0.001111
## n= 228, number of events= 165