All Questions
4 questions
5
votes
3
answers
226
views
Cox model - unsure of time unit of analysis
I am running a survival analysis (Cox model) on time to event in cancer patients. The start of followup is end of treatment. Tests for the event (recurrence) are performed every 6 months from cancer ...
- 923
2
votes
1
answer
119
views
Is it possible to generate a scatterplot of relative hazard for participants superimposed on Cox regression line?
I have been using the rms package in R to perform Cox regression on time-to-event data. I have used the ...
1
vote
1
answer
143
views
Presentation of a 3x3 categorical interaction for Cox proportional hazards regression using RMS package
I wanted to verify my presentation of a 3x3 interaction of two categorical variables var1 (exposure of interest) and var2 (effect modifier of interest) using the rms...
- 11
9
votes
3
answers
17k
views
Computing c-index for an external validation of a Cox PH model with R
First off, I'll state that I'm aware many questions get asked about the c-index. I've searched this site and others, and I haven't found an answer for my situation. I can successfully use ...
- 927