Hi,
after standardizing my data by dividing each covariate by its mean, the hazard
ratio of variables ranges btw ~ 0.5 and 3.55. when i test the PH assumption by
cox.zph, rho ranges btw -0.4235863 and 0.359827. visualizing the PH assumption
by plot, the plot of scaled schoefeld residuals against transformed time
doesn't give a line with slope 0 for all covariates. note that there are 100
covariates and 300 samples.
Look forward to your reply,
Carol
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