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tmp56
2008 Dec 04
1
comparing SAS and R survival analysis with time-dependent covariates
Dear R-help,
I was comparing SAS (I do not know what version it is) and R (version
2.6.0 (2007-10-03) on Linux) survival analyses with time-dependent
covariates. The results differed significantly so I tried to understand
on a short example where I went wrong. The following example shows that
even when argument 'method' in R function coxph and argument 'ties' in
SAS procedure