Survival analysis for a list of genes using TCGA data

Hi all,

I have a list of genes (around 300 genes) and I want survival analysis to find only significant genes. I am using TCGA RSEM normalized data in survival package using following command, but I’m not sure how to choose significant genes.

coxph(Surv(OS_MONTHS, Events) ~., data=merged_data [, c(2, 4:303)])

output…

                              coef    exp(coef)           se(coef)    z    p
Gene1                0.07092   1.07349  0.05348 1.33 0.18
Gene2               0.02332   1.02360  0.05813 0.40 0.69
Gene3               0.00175   1.00175  0.06734 0.03 0.98
Gene n.....

Thanks