Greetings dear members, I have a dataset of 630 patients, with just 8 events, so when I run a Cox regression with Firth correction, I have that none of the variables taken under consideration,are significant. Please are there other ways to study or explore in such situations,
With 8 events in 630 patients, it's really not surprising that nothing is significant. I think it is also unlikely that another analysis method would return a different result.
The real answer is that you don't have enough data to find statistical significance.
ANOVA, or Analysis Of Variance, is used to compare the averages or means of two or more populations to better understand how they differ. Watch this tutorial for more.