time_dependent_cox_results

> summary(fit)
Call:
coxph(formula = Surv(start_time, end_time, churned) ~ contacted_support, 
    data = data)

  n= 2000, number of events= 150 

                    coef exp(coef) se(coef)    z Pr(>|z|)    
contacted_support 0.6389    1.8943   0.1841 3.47 0.000521 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

                  exp(coef) exp(-coef) lower .95 upper .95
contacted_support     1.894     0.5279      1.32     2.718

Concordance= 0.555  (se = 0.016 )
Rsquare= 0.006   (max possible= 0.664 )
Likelihood ratio test= 11.24  on 1 df,   p=0.0008017
Wald test            = 12.04  on 1 df,   p=0.0005213
Score (logrank) test = 12.4  on 1 df,   p=0.00043

> cox.zph(fit)
                   rho chisq      p
contacted_support 0.18  4.41 0.0358