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RE: st: Is it possible to retrieve logit transformed confidence intervals as displayed by svy tabulate using estpost?


From   "McDermaid, Cameron" <Cameron.McDermaid@ottawa.ca>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Is it possible to retrieve logit transformed confidence intervals as displayed by svy tabulate using estpost?
Date   Tue, 12 Mar 2013 14:37:06 +0000

Thanks for your help, Roger.

This is exactly what I was looking for.

-cam



-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Roger B. Newson
Sent: March 11, 2013 5:34 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: Is it possible to retrieve logit transformed confidence intervals as displayed by svy tabulate using estpost?

I don't know about -estpost-. However, retrieving the confidence intervals output by -svy: tabulate- looks like a job for the -parmest- package, which you can download from SSC. If you install -parmest- and then type

help parmcip

then the online help for the -parmcip- option of the -parmest- package contains an example (the final example) of the use of -parmest- and
-parmcip- to retrieve the confidence limits that you are looking for.

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 11/03/2013 17:58, McDermaid, Cameron wrote:
>
> Is there any way to retrieve the logit transformed confidence intervals as displayed by -svy: tabulate- when using estpost?
>
> e.g.  -estpost svy: tabulate var1 var2, proportion cv ci obs col 
> format(%11.0g)-
>
> I can obtain most of the output I want using the following, however the confidence intervals are untransformed:
> - estout using output.txt, cells("b se ci_l ci_u") unstack-
>
> I'm also not able to extract the coefficient of variation but can calculate it easily enough using the standard error.  Transforming the confidence intervals manually seems impractical due to differences when compared to the values Stata calculates, perhaps due to the accumulation of rounding and the challenge of inputting the t critical value based on df.
>
> This is a "nice to have" because I could use the untransformed ci's, it's just not ideal.  I've perused Statalist and the reference docs for estpost and estout but haven't come across a way to do this.
>
>
> - cam
>
> Cameron McDermaid MHSc
> Epidemiologist
> Ottawa Public Health
> 100 Constellation Crescent 26-50
> Ottawa ON K2G 6J8
> vox 613-580-6744x15321
> fax 613-580-9601
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This e-mail originates from the City of Ottawa e-mail system. Any 
distribution, use or copying of this e-mail or the information it 
contains by other than the intended recipient(s) is unauthorized. 
If you are not the intended recipient, please notify me at the 
telephone number shown above or by return e-mail and delete 
this communication and any copy immediately. Thank you.

Le présent courriel a été expédié par le système de courriels de 
la Ville d'Ottawa. Toute distribution, utilisation ou 
reproduction du courriel ou des renseignements qui s'y trouvent 
par une personne autre que son destinataire prévu est interdite. 
Si vous avez reçu le message par erreur, veuillez m'en aviser par 
téléphone (au numéro précité) ou par courriel, puis supprimer 
sans délai la version originale de la communication ainsi que 
toutes ses copies. Je vous remercie de votre collaboration.



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