[R] differences between survival models between STATA and R
therneau at mayo.edu
Mon Jul 9 15:59:07 CEST 2012
Without more information, we can only guess what you did, or what you
are seeing on the page that is "different".
I'll make a random guess though. There are about 5 ways to paramaterize
the Weibull distribution. The standard packages that I know, however,
tend to use the one found in the Kalbfleisch and Prentice book The
Statistical Analysis of Failure time Data. This includes the survreg
funciton in R and lifereg in SAS, and likely stata tthought I don't know
that package. The aftreg function in the eha package uses something
About 1/2 the weibull questions I see are due to a change in parameters.
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I have been using two types of survival programs to analyse a data set.
The first one is an R function called aftreg. The second one an STATA
function called streg.
Both of them include the same analyisis with a weibull distribution. Yet,
results are very different.
Shouldn't the results be the same?
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