Kaplan-Meier - different p-values according to different time points

[antor82]

Hi All!

I'm conducting a survival analysis and I would like to test if there were differences in freedom from events at different time points (e.g. 1 yr - 2 yr  and so on) between groups.

Can anybody give me some hints?

Tks in advance

Antonio

[cminard]

The purpose of the survival analysis is to account for censoring and to use all available data. I suggest reporting the log-rank p-value for the KM curve. Then, the plot can include 95% confidence bands. If you're interested in reporting, say, the 1- and 2-year marks, then you can report the survival probabilities with 95% confidence intervals by group and time point. I don't think that it's advantageous or useful to do a formal hypothesis test at those time points.

[antor82]

thank You for your suggestion

[riya275]

Maybe you should consider using cox-proportion model.