All Questions
6 questions with no upvoted or accepted answers
5
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How to better understand when to use Weibull AFT versus Cox Model for Failure Data
I am struggling to understand when I should consider using a Cox regression model versus using a Weibull AFT model to predict the end of life of mechanical components.
I have tried to apply the Cox ...
- 95
1
vote
1
answer
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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...
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1
vote
1
answer
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Cox Regression and Linkage Disequilibrium
I'm trying to figure out the best way to account for linkage disequilibrium in a cox regression, and would really appreciate your advice. I'm testing the effect of a particular allele on overall ...
- 41
0
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Constructing nomogram from approximate model in Regression Modelling Strategies
In section 19.5 in Regression Modelling Strategies by Frank Harrell we make an approximate model using linear regression with ols. Since this is an ols object we have to calculate survival quantities ...
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0
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What should I do if only 1 covariate violate the proportionality assumption in Cox PH?
Can I still use Cox PH model? or I will have to find a non-PH model? What are the available models that can be used here?
Schoenfeld residuals (using ...
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In cox model, can the hemoglobin and homoglobin group be put in the same model?
fit.tdc <-
coxph(Surv(t1,t2,status) ~ Hemoglobingroup + hemoglobin + sex +
diabet + cluster(id), data)
fit.tdc
Can the hemoglobin and hemoglobin group be put ...
- 11