Search found 7 matches

by drsatpalsandhu
Fri Jul 04, 2014 6:19 am
Forum: runmlwin user forum
Topic: using runmlwin for Meta Analysis of longitudinal studies
Replies: 7
Views: 3368

Re: using runmlwin for Meta Analysis of longitudinal studies

Hello George,
Thanks for providing insight and explanation in form of codes for undertaking meta-analysis of combined IPD and AD data structure. Now it is clear as how to define IPD and AD in the same data and to constraint the varinace of AD. Thanks once again.
Best wishes
satpal
by drsatpalsandhu
Mon Jun 30, 2014 4:33 am
Forum: runmlwin user forum
Topic: using runmlwin for Meta Analysis of longitudinal studies
Replies: 7
Views: 3368

Re: using runmlwin for Meta Analysis of longitudinal studies

Dear George, I used you example and replicated results as you shown by you. I think this is a good method for meta-analysis of aggregate data. However, my query is as how to use similar methodology for three level data structure and to constraint the within trial variance for only those studies whic...
by drsatpalsandhu
Thu Jun 26, 2014 4:45 pm
Forum: runmlwin user forum
Topic: using runmlwin for Meta Analysis of longitudinal studies
Replies: 7
Views: 3368

Re: using runmlwin for Meta Analysis of longitudinal studies

Dear George, I would like to first apologies for my delayed response to your post. Actually I was figuring out as how to constraint the within trial variance for studies which provided only aggregate data. In case of proc mixed procedure of SAS software, we can use parms statement with hold/eqcons o...
by drsatpalsandhu
Thu Jun 12, 2014 7:51 am
Forum: runmlwin user forum
Topic: using runmlwin for Meta Analysis of longitudinal studies
Replies: 7
Views: 3368

using runmlwin for Meta Analysis of longitudinal studies

Hi I am doing a meta analysis of longitudinal studies involving continuous outcome response. Out of total 10 eligible studies, 8 studies provided individual participant data (IPD) whereas aggregate summary statistics (effect size and standard error) is available from two other 2 studies. For IPD alo...
by drsatpalsandhu
Thu Nov 07, 2013 5:44 pm
Forum: Realcom user forum
Topic: longitudinal dataset
Replies: 5
Views: 4013

Re: longitudinal dataset

Hi Can we extend Realcom Impute (through stata realcomImpute commands) to three level data structure. For example in case of one-stage meta analysis of longitudinal studies where repeated measurements (level 1) nested within individual (level 2), which are further nested in studies (level 3). Regard...
by drsatpalsandhu
Thu Nov 07, 2013 5:33 pm
Forum: runmlwin user forum
Topic: Multiple imputation with RealCom and runmlwin
Replies: 11
Views: 8077

Re: Multiple imputation with RealCom and runmlwin

Hi George,
It worked perfectly. Thanks a lot for the help.
Best Regards
Sandhu
by drsatpalsandhu
Tue Oct 29, 2013 12:48 pm
Forum: runmlwin user forum
Topic: Multiple imputation with RealCom and runmlwin
Replies: 11
Views: 8077

Re: Multiple imputation with RealCom and runmlwin

Hi George and Jamie, I was thinking about the same i.e how to combine runmlwin, REALCOM imput and MLwiN. The thing is that i can do multiple imputations using REALCOM impute through realcomimpute Stata command and could successfully use mi estimate: xtmixed..... in stata to analyze multiple imputed ...