Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: mi impute monotone inconsistencies
From
raoul reulen <[email protected]>
To
[email protected]
Subject
st: mi impute monotone inconsistencies
Date
Mon, 10 May 2010 01:12:41 +0100
Dear all
I have a dataset with information on whether patients received a
certain drug or not, and if so what dose of drug. Both the variables
"drug (yes=1/no=0)" and "dose (continuous)" have missing values and
the pattern in monotone. If drug is "no" then the dose is obviously
"0", and if drug is "yes" then the dose cannot be "0". When I use an
imputation model I do get a few inconsistencies, occasionally dose is
"0" when drug is "yes" and occasionally dose is greater then "0" if
the patient did not receive any drugs.
.mi set mlong
.mi register imputed drug dose
.mi register regular case age year
.mi misstable nested
.mi impute monotone (logit) drug (pmm) dose = case age year , add(5)
rseed(8833)
What am I doing wrong? Thanks.
Raoul
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/