Hi all,

Can anyone guide me how to carry out a Firth Penalized Cox Regression with STATA?

One of my groups in my survival analysis had zero events, so the cox regression model is estimating a hazards rate of 0 and p-value of 1, which is not working out, so I am thinking to try Firth's method to get around this problem. Any other suggestions on how to overcome this problem would be appreciated.

Thank you in advance.