For instance, I have A treatment modality and I want to analyze overall and progression-free survival rates in 2 groups of patients : young and old ones. These two groups have two corresponding subgroups of patients according to disease-related factor. Is Cox-regression analysis appropriate in this case?
Kathrin Möllenhoff
You have to provide more information in order to answer whether Cox regression can be used. And do you ask considering specific software?
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Robert Galbreath
It may be that you will need to use a competing risk analysis if any patients have died during the time of observation.
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