All Questions
7 questions
6
votes
2
answers
2k
views
External validation of a published Cox PH model
My aim is to externally validate a risk prediction model published in the medical literature that is based on a Cox regression model. I have a dataset with all the variables from the score. I read ...
- 28
7
votes
1
answer
5k
views
Relative importance of variables in Cox regression
I've understood that relative importance of predictors is a tricky question. Suggested methods range from very complex models to very simple variable transformations. I've understood that the ...
- 1
7
votes
1
answer
3k
views
How to visualize a significant interaction between two linear predictors using the rms package?
Two linear predictors interact significantly (see below). How can I visualize this interaction in a plot?
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- 7,816
3
votes
1
answer
3k
views
Interpretting Cox Regression ANOVA
I'm having difficulty interpreting the results from anova() in the rms package. My confusion arises from what information the <...
- 102k
2
votes
2
answers
2k
views
predict from a Cox model with beta coefficients
I fitted a Cox PH model in R with the survival package and the coxph function.
I get the beta estimates from this model.
How can I use these coefficients to ...
- 163
1
vote
1
answer
391
views
Comparing regression models with different coding of the same linear predictor
How can I determine whether one coding of a linear predictor leads to a better fit of the corresponding regression model than the other?
In the following example, the restricted cubic spline coding of ...
- 575
7
votes
2
answers
7k
views
Comparing a linear model with a spline model
I try to figure out how to describe my continuous variable. Unfortunately, I did not understand all of the statistics. I would really appreciate I you guys would help me out here. To better illustrate ...
- 575