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st: Bootstrapping confidence interval of mean difference


From   Susan Maree Cotton <smcotton@unimelb.edu.au>
To   statalist@hsphsun2.harvard.edu
Subject   st: Bootstrapping confidence interval of mean difference
Date   Mon, 18 Aug 2008 10:48:05 +1000

Hi All,

I have data from a randomized clinical trial with intervention and treatment as usual groups. The outcome data is cost-effectiveness data. Reviewers of a manuscript pertaining to data from this trial have requested that the bootstrapped confidence interval of the mean difference between groups be reported.   

I am a new user to STATA and have been having difficulties determining the correct commands to generate these confidence intervals.  I have worked out how to bootstrapping for the confidence intervals of the means for the two groups separately and to bootstrap the t-distribution pertaining to difference between groups but cannot work out the confidence interval for mean difference.  Please help!!

Thanks in advance.

KR

Sue

 

Dr Sue Cotton 

Senior Research Fellow

ORYGEN Research Centre

Department of Psychiatry

University of Melbourne

Locked Bag 10 (35 Poplar Road)

Parkville Victoria

Australia 3052

Phone: +61 3 9342-2859

Fax:      +61 3 9342-2941

Mobile:  0407-340-115

smcotton@unimelb.edu.au




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