Thanks. SUDAAN does allow multiply imputed variables in the subgroup statement. The regression will proceed without error or warning. My concern is that there is a statistical issue that I am overlooking. Stata allows users to specify a multiply imputed variable in a subpop statement also but requires an option (esampvaryok) after a big warning. -L
On Wed, Jul 10, 2013 at 12:37 PM, David Judkins <[email protected]>wrote: > Users of SUDAAN need to be careful to always give it the full dataset > and use the subgroup statement to get subpopulation estimates. Prior > subsetting will not give correct results. I do not know though if SUDAAN > allows you to have multiply imputed values for variables listed on the > subgroup statement. I suspect not. This might be a case, where you need > to write your own software. Easiest if you use replicated weights for the > within-imputation variance. > > > > Here is one version of the SUDAAN warning: > > http://www.ats.ucla.edu/stat/sudaan/faq/subpopn.htm > > > > --Dave Judkins > > > > *From:* Impute -- Imputations in Data Analysis [mailto: > [email protected]] *On Behalf Of *Lucy Bilaver > *Sent:* Wednesday, July 10, 2013 12:33 PM > *To:* [email protected] > *Subject:* MI analysis with complex survey data > > > > Hi everyone, > > I have fit an imputation model for complex survey data that I am working > with. I ran the imputation in Stata and have been doing the analysis in > Stata and Sudaan. > > > > I am trying to understand what the issues are when analyzing a subsample > of multiply imputed data that varies in size across imputations. The > subsample is based on an imputed variable thus the reason for the slight > variation across imputations is clear. Stata warns that this situation > could "bias results" while Sudaan does not. Does anyone have thoughts on > the implications of having estimation samples that vary across imputations > when using a complex survey design? In both Stata and Sudaan, I am asking > for SE to be computed using a Taylor linearization method. > > Thanks! > > -L > > > > -- > > Assistant Professor > Northern Illinois University > School of Nursing and Health Studies > [email protected] > > Affiliated Scholar > Chapin Hall at the University of Chicago > [email protected] > 773-256-5237 > > > ------------------------------ > This message may contain privileged and confidential information intended > solely for the addressee. Please do not read, disseminate or copy it unless > you are the intended recipient. If this message has been received in error, > we kindly ask that you notify the sender immediately by return email and > delete all copies of the message from your system. > -- Assistant Professor Northern Illinois University School of Nursing and Health Studies [email protected] Affiliated Scholar Chapin Hall at the University of Chicago [email protected] 773-256-5237
