cox regression

  1. G

    Stratified log rank vs cox regression

    Hello everyone, I am performing a survival analysis to compare survival with two treatment regimen (with SPSS). With Log-rank p value is significant (p: 0,033) When stratified with a binary variable significance is lost (p:0,062) With Cox regression (backward LR method) only variable left in...
  2. L

    How to interpret and compare models in Cox regression?

    Hallo, I am trying to interpret the results of a Cox regression; I am doing a PhD in medicine. I love statistics but my question is still pretty basic, I think, and I did not find an answer in previous threads. I have to compare different models (just a couple of predictors in each...
  3. D

    Is a Cox regression the right test for my question?

    I would like to test if the value of a blood parameter is linked to death (age as a covariate)....example: higher serum creatinine = higher risk to die? I know how to make a cox regression with two groups (e.g.two different medications), but can I also work with a question like described above...
  4. M

    Gehan-Breslow-Wilcoxon test or Cox regression

    Hello, I am looking at the relatively small dataset and comparing the survival of 2 groups of mice. The end survival is not very difference but it is mostly the hazard ratio which is not very consistent, one group showing a higher ratio in the earlier time. I went for Gehan-Breslow-Wilcoxon...
  5. F

    Using Cox multivariant regression!

    Hi I am trying to do Cox multivariate regression analysis in a project where I am trying to identify predictors of a particular disease using variables such age, X- ray findings, and other identified known risk factors, and I am wondering how to perform such an analysis using excel, or even...
  6. F

    Using Cox multivariant regression!

    Hi I am trying to do Cox multivariate regression analysis in a project where I am trying to identify predictors of a particular disease using variables such age, X- ray findings, and other identified known risk factors, and I am wondering how to perform such an analysis using excel, or even...
  7. M

    Cox Proportional Hazards Regression

    Hi, I am hoping someone can help me with which model (frailty, strata or cluster) I should use for my data. I have paired data so I need to take that into account when modelling the Cox PH Regression and am unsure which model will give me a more accurate result. My study was looking at the...
  8. A

    Help with Pre-Post Analyses (only 2 trials and no between subjects effects)

    I need some help for my thesis - am not getting much from my stats committee member. I am looking at change in scores across treatment on a particular measure. I am using data kept in a forensic facility and I don't have any latitude to do more than what they do (i.e., pre and post testing). I...
  9. E

    Cox regression model in survival: is it a multiple or multivariate type regression?

    Hi, I have seen in quite a few publications where cox regression is used and results are presented as "multivariate analysis showed .... ". On the other hand if it is a multivariate technique, can we talk about independent variables? As an example: "On multivariate analysis, XX risk factors...