[R] survreg() provides same results with different distirbutions for left censored data

ifejobi ifejobi at gmail.com
Wed Dec 7 17:55:42 CET 2011


I'm working with some left censored survival data using accelerated failure
time models.  I am interested in fitting different distributions to the data
but seem to be getting the same results from the model fit using survreg
regardless of the assumed distribution.

These two codes seem to provide the same results:

aft.gaussian <- summary(survreg(Surv(y,y>0),type="left")~
aft.weibull <- summary(survreg(Surv(y,y>0),type="left")~



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