Top "Cox-regression" questions

The term Cox regression model (omitting proportional hazards) is sometimes used to describe the extension of the Cox model to include time-dependent factors.

What does is.na() applied to non-(list or vector) of type 'NULL' mean?

I want to select a Cox model with the forward procedure from a data.frame with no NA. Here is …

r na cox-regression
R coxph() warning: Loglik converged before variable

I'm having some trouble using coxph(). I've two categorical variables: Sex and Probable Cause, that I want to use as …

r survival-analysis categorical-data cox-regression
coxph() X matrix deemed to be singular;

I'm having some trouble using coxph(). I've two categorical variables:"tecnologia" and "pais", and I want to evaluate the possible …

r survival-analysis cox-regression
Likelihood Ratio Test for Cox Models in R

Does anyone know of a likelihood ratio test, like lrtest in the lmtest package, that works for cox proportional hazards …

r cox-regression
How to predict survival time in Cox's Regression Model in R?

I have a modeled a problem using Cox's regression and now want to predict the estimated survival time for an …

r survival-analysis cox-regression
Survival Analysis for Telecom Churn using R

I am working on Telecom Churn problem and here is my dataset. http://www.sgi.com/tech/mlc/db/churn.…

r sas logistic-regression survival-analysis cox-regression
Plot Kaplan-Meier for Cox regression

I have a Cox proportional hazards model set up using the following code in R that predicts mortality. Covariates A, …

r plot survival-analysis cox-regression
How to plot a Cox hazard model with splines

I have a following model: coxph(Surv(fulength, mortality == 1) ~ pspline(predictor)) where is fulength is a duration of follow-up (including …

r cox-regression splines
Cox regression python

Are there any packages in Python for survival analysis? Specifically, I am interested in performing a Cox regression? I know …

python cox-regression
Setting reference group for Hazard Ratio computed using coxph function in R

when i run coxph(Surv(Time, Status)~Class, data = df) on data set like below it always sets the reference …

r cox-regression