[S] Question on relative risk vs hazard ratio

["Jahn, Michaela {PDBS~Basel}" <MICHAELA.JAHN@roche.com>]

> Out of curiosity I compared the results of proc phreg in sas (using the
> Efron-option) with coxph in s-plus. 
> I expected the same results but obtained different onest. Can somebody
> please explain the difference between relative risk (in splus) and hazard
> ratio (in sas). From reading the manuals I thought it would be the same. 
> 
> Thanks for the help
> Michaela Jahn
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