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st: query on right-censored predictors/covariates


From   Richard Goldstein <richgold@ix.netcom.com>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   st: query on right-censored predictors/covariates
Date   Thu, 24 Jun 2010 11:30:25 -0400

Hi all,

I think that the type of issue described below occurs in surveys and in
econometrics, among other areas and would be particularly interested in
responses from anyone who knows that lit; note that I have done a lit
search (primarily via the Current Index to Statistics (CIS) and I have
found some lit re: left-censored data (below/at limits of detectability)
-- but this, although related, is not quite the same)

in addition to the example below, another variable that is
right-censored is a count variable where the data base is topped at 10;
since about 1/3 of my observations have a 10, I feel that I need to do
something about this variable; the counts through 9 are reasonably
poisson distributed

I have a data set in which the outcome is *not* censored but at least 2
of the predictors (e.g., age which is "topcoded") are right censored and
am looking for any literature dealing with this; right now I am leaning
toward treating this as a missing data problem but I am certainly open
to other solutions also

re: use of multiple imputation, I would certainly need to constrain the
imputed values to be at, or larger than, the current top value; I see no
way to do this in either -mi- or -ice-: have I missed something?

any advice, help, citations greatly appreciated

thanks,

Rich

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