[R] survreg with measurement uncertainties

Andrews, Chris chrisaa at med.umich.edu
Wed Jun 12 15:34:46 CEST 2013

survreg allows interval censored data, if that is how you want to represent measurement uncertainty.  See


-----Original Message-----
From: Kyle Penner [mailto:kpenner at as.arizona.edu] 
Sent: Tuesday, June 11, 2013 8:02 PM
To: r-help at r-project.org
Subject: [R] survreg with measurement uncertainties


I have some measurements that I am trying to fit a model to.  I also have uncertainties for these measurements.  Some of the measurements are not well detected, so I'd like to use a limit instead of the actual measurement.  (I am always dealing with upper limits, i.e. left censored data.)

I have successfully run survreg using the combination of well detected measurements and limits, but I would like to include the measurement uncertainty (for the well detected measurements) in the fitting.  As far as I can tell, survreg doesn't support this.  Does anyone have a suggestion for how to accomplish this?



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