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Results tagged with cox-model
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user 409279
Cox proportional hazards regression is a semi-parametric method for survival analysis. No distributional form needs to be assumed, only that the effect of one-unit increase in a covariate is a constant multiple.
1
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290
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How does the "ZPH" option of PROC PHREG in SAS 9.4 works?
As I saw in SAS 9.4 documentation, the "ZPH" option in PROC PHREG statement requests diagnostics based on the weighted Schoenfeld residuals for checking the proportional hazards assumption. Then I use …
- 123
11
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1
answer
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SAS and R produced different results for the same cox ph model on the same data
I have fitted a Cox ph model using both R 4.3.1 and SAS 9.4 with the same data. In SAS, I used Proc phreg, while coxph function in Survival package, the model formula are totally the same, but I got d …
- 123