Re: st: RE: Stata has disappointing support of contrasts/multiple comparisons in mixed ANOVA

[David Airey <david.airey@Vanderbilt.Edu>]

.

Can you post such an analysis of a simple split plot design?

-Dave

On Mar 11, 2008, at 8:39 AM, Newson, Roger B wrote:

> I personally do a lot of work with multiple comparisons. However, I  
> use
> -parmest-, -dsconcat- and -metaparm- to produce a dataset with 1
> observation per comparison, and -smileplot- and -multproc- to do the
> various multiple-test procedures.
>
> The -parmest- package (which includes -metaparm-), the -smileplot-
> package (wiich includes -multproc-), and the -dsconcat- package, can  
> all
> be downloaded from SSC. More papers on all of these packages can be
> downloaded frommmy website (see my signature below).
>
> I hope this helps.
>
> Roger
>
>
> Roger B Newson
> Lecturer in Medical Statistics
> Respiratory Epidemiology and Public Health Group
> National Heart and Lung Institute
> Imperial College London
> Royal Brompton campus
> Room 33, Emmanuel Kaye Building
> 1B Manresa Road
> London SW3 6LR
> UNITED KINGDOM
> Tel: +44 (0)20 7352 8121 ext 3381
> Fax: +44 (0)20 7351 8322
> Email: r.newson@imperial.ac.uk
> Web page: www.imperial.ac.uk/nhli/r.newson/
> Departmental Web page:
> http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/pop
> genetics/reph/
>
> Opinions expressed are those of the author, not of the institution.
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Feiveson,
> Alan H. (JSC-SK311)
> Sent: 11 March 2008 13:26
> To: statalist@hsphsun2.harvard.edu
> Subject: st: Stata has disappointing support of contrasts/multiple
> comparisons in mixed ANOVA
>
> Hi  - I have been repeatedly asked by people who I convinced to buy
> Stata how to do multiple comparisons of interaction effects under more
> "complicated" anova models such as those with at least one factor  
> random
> and possibly with repeated measures, etc. Apparently Stata does not  
> have
> a built-in command/option for multiple comparisons for anything but a
> one-way model and does not even support approximate methods for such
> comparisons other than using xtmixed and creating all the contrasts  
> and
> tests "by hand". Even then, further processing has to be undertaken to
> account for multiple testing.
>
> Embarassingly enough, I have had to refer people to SAS to do these
> types of comparisons without a lot of customized programing. Am I
> missing something or is Stata really woefully deficient in this area?
>
> Al Feiveson
>
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--
David C. Airey, Ph.D.
Pharmacology Research Assistant Professor
Center for Human Genetics Research Member

Department of Pharmacology
School of Medicine
Vanderbilt University
Rm 8158A Bldg MR3
465 21st Avenue South
Nashville, TN 37232-8548

TEL   (615) 936-1510
FAX   (615) 936-3747
EMAIL david.airey@vanderbilt.edu
URL   http://people.vanderbilt.edu/~david.c.airey/dca_cv.pdf
URL   http://www.vanderbilt.edu/pharmacology



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