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st: Help with multiple imputation using Stata


From   Adriana Pinho <adrianaapinho@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Help with multiple imputation using Stata
Date   Fri, 16 Nov 2007 17:05:52 -0200

I'd like some help to perform multiple imputation on my database. I
have four categorical variables (yes/no): malepart, d10y_cp, e10y_np,
d6msex_male and three continuous variables: numcp10y3, numnp10y2,
elife_lp. All of them have around 20% missing values. I read in some
papers that the best option for imputation would be the multiple
imputation. I found the Stata's command for MI but I'm not sure
whether I've been running it correctly. I followed all instructions on
the Stata library, but something is still wrong. I typed:

"ice d10y_cp e10y_np numcp10y3 numnp10y2 elife_lp d6msex_male malepart
cp10y1 cp10y2 np10y1 np10y2 male6m1 male6m2 malever1 malever2 using
impnew, m(5) passive(cp10y1:d10y_cp==1 \cp10y2:d10y_cp==2
\np10y1:e10y_np==1 \np10y2:e10y_np==2 \male6m1:d6msex_male==1
\male6m2:d6msex_male==2 \malever1:malepart==1 \malever2:malepart==2)
sub(d10y_cp: cp10y1 cp10y2, e10y_np: np10y1 np10y2, d6msex_male:
male6m1 male6m2, malepart: malever1 malever2) replace"

Does this command make sense?

The Stata's output was:

"Error running -uvis- I detected a problem with running uvis with
command logit on response e10y_np
and covariates numcp10y3 numnp10y2 elife_lp cp10y1 cp10y2 male6m1
male6m2 malever1 malever2 r(198)"


I have no idea which error was exactly detected. Could you give me a
clue to what I have been doing wrongly?

Thanks in advance.

Regards,

Adriana

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