Re: st: Re: [Stata 9] Anova and control

["Paul Fenner" <paulfenner@hotmail.co.uk>]

Roger,
Many thanks for your help. I use smileplot and parmest but did not think 
that I could use them to make a comparison to a control rather than "all 
comparisons". I will go back and read the Stata Journal again.
Paul


> From: Roger Newson <roger.newson@kcl.ac.uk>
> Reply-To: statalist@hsphsun2.harvard.edu
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: Re: [Stata 9] Anova and control
> Date: Wed, 25 May 2005 13:42:20 +0100
>
> At 13:25 25/05/2005, Paul Fenner wrote:
> > I have an anova where 3 treatments have to be compared to a control. When 
> > I used to use SAS I used Dunnett's multiple comparison with the control 
> > option, but  cannot find any similar procedure in Stata. I was considering 
> > using the test option and compare each treatment with the control but I am 
> > a concerned that this does not take into account the mutiple comparisons. 
> > I would be grateful for any suggestions on how to approach this problem.
> A wide range of multiple-test procedures (including the Sidak procedure, on 
> which I think that Dunnett's procedure is probably based) is available 
> using the -smileplot- package, downloadable from SSC. This can be used 
> together with the -parmest- package (also downloadable from SSC), in a way 
> documented in Newson et al. (2003). Use the -ssc- command to download 
> things from SSC.
>
> I hope this helps.
>
> Best wishes
>
> Roger
>
>
> References
>
> Newson, R. and the ALSPAC Study Team. 2003. Multiple-test procedures and 
> smile plots.
> The Stata Journal 3(2): 109-132. Also downloadable from Roger Newson's 
> website at
> http://www.kcl-phs.org.uk/rogernewson.
>
>
> --
> Roger Newson
> Lecturer in Medical Statistics
> Department of Public Health Sciences
> Division of Asthma, Allergy and Lung Biology
> King's College London
>
> 5th Floor, Capital House
> 42 Weston Street
> London SE1 3QD
> United Kingdom
>
> Tel: 020 7848 6648 International +44 20 7848 6648
> Fax: 020 7848 6620 International +44 20 7848 6620
>   or 020 7848 6605 International +44 20 7848 6605
> Email: roger.newson@kcl.ac.uk
> Website: http://phs.kcl.ac.uk/rogernewson/
>
> Opinions expressed are those of the author, not the institution.
>
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