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3 questions
1
vote
1
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Interpretation of interaction between variable and time in cox regression
I was running a model to check the survival rate among different treatments. Basically, the treatment has four groups. I firstly plot a K-M curve and noticed clear interactions among the four ...
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1
vote
1
answer
436
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Covariate and Interaction Not Significant When Both in the Model
I am looking at a survival model based on dosing variables, all of which are continuous. I have noticed when categorized, based on Kaplan Meier Curves, that low, medium, high doses behave differently, ...
- 79
2
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2
answers
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Which method of handling non-proportional hazards (here: crossed KM curves in 2+ points) would you prefer?
I have an experiment, where I compare two groups over time in frames of the time to event analysis.
The Kaplan-Meier curves cross 3 times.
It means, that the hazards ratios switch to the opposite side ...
