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Liamb
Obsidian | Level 7

Hello,

 

After using this syntax on imputed data (10 imputations), I can not retrieve parameterEstimates for the 10 imputations and then use Rubin's method for the global analysis. Is it possible? If yes, how to do it?

proc ttest data=ttest_cd;
paired cd1*cd2;
by _imputation_;
ods output parameterEstimates=diff ;
run;

Thanks

1 ACCEPTED SOLUTION

Accepted Solutions
SAS_Rob
SAS Employee

You would need the Statistics ODS table from TTEST to do this.  Below is a full example you should be able to follow.

 

/*Create a Sample dataset*/

data a;
do rep=1 to 40;
if ranuni(3211)>.6 then y1=.;
else y1=1.6+rannor(3211);
if ranuni(3211)>.8 then y2=.;
else y2=2.3+rannor(3211);
output;
end;
run;

 

proc mi data=a seed=10 out=outmi;
var y1 y2;
run;

proc ttest data=outmi;
by _imputation_;
paired y1*y2;
ods output statistics=t_stats;
run;

 

proc mianalyze data=t_stats;
modeleffects mean;
stderr stderr;
run;

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2 REPLIES 2
SAS_Rob
SAS Employee

You would need the Statistics ODS table from TTEST to do this.  Below is a full example you should be able to follow.

 

/*Create a Sample dataset*/

data a;
do rep=1 to 40;
if ranuni(3211)>.6 then y1=.;
else y1=1.6+rannor(3211);
if ranuni(3211)>.8 then y2=.;
else y2=2.3+rannor(3211);
output;
end;
run;

 

proc mi data=a seed=10 out=outmi;
var y1 y2;
run;

proc ttest data=outmi;
by _imputation_;
paired y1*y2;
ods output statistics=t_stats;
run;

 

proc mianalyze data=t_stats;
modeleffects mean;
stderr stderr;
run;

Liamb
Obsidian | Level 7

Thanks a lot Rob

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