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Re: st: tukey/dunnett procedures


From   Richard Goldstein <richgold@ix.netcom.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: tukey/dunnett procedures
Date   Wed, 15 Jun 2011 08:57:55 -0400

thanks to both Steve and Roger -- Rich

On 6/14/11 9:57 PM, Steven Samuels wrote:
> 
> Rich-
> 
> 
> In Theresa Boswell's dunnett.ado (-findit-), there is a section:
>  
>         /* Call oneway and save mse and df */
>         qui oneway `resp' `fact' if `touse',missing 
>         local mse = r(rss)/r(df_r)
>         local df = r(df_r)
>   
> If you can substitute the proper values of the MSE and degrees of freedom from your nested ANOVA command and meet the other requirements of -dunnett- (e.g. equal numbers per group), I think that will do it. Perhaps you can supply the same numbers to -princomp- or -smileplot-.
> 
> Steve
> 
> Steven J. Samuels
> Consultant in Statistics
> 18 Cantine's Island
> Saugerties, NY 12477 USA
> Voice: 845-246-0774
> Fax:   206-202-4783 
> samplerx@earthlink.net
> 
>  
> On Jun 14, 2011, at 10:49 AM, Richard Goldstein wrote:
> 
> hi,
> On Jun 14, 2011, at 2:47 PM, Roger Newson wrote:
> 
> I think you'll find that the Dunnett multiple-test procedure is really the Sidak multiple-test procedure. This is available using the -smileplot- package, downloadable from SSC. And the corresponding frequentist q-values are available from the -qqvalue- package, also downloadable from SSC.
> 
> I hope this helps.
> 
> Best wishes
> 
> Roger
> 
> 
> Roger B Newson BSc MSc DPhil
> 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: http://www.imperial.ac.uk/nhli/r.newson/
> Departmental Web page:
> http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/
> 
> Opinions expressed are those of the author, not of the institution.
> 
> On 14/06/2011 15:49, Richard Goldstein wrote:
>> hi,
>>
>> I am looking for any programs, or advice, on doing post-hoc Tukey and
>> Dunnett procedures in Stata following a nested ANOVA command
>>
>> I am familiar with Gleason's -prcomp- command but it cannot handle nesting
>>
>> thanks,
>>
>> Rich
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