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Re: st: ANCOVA using only summary data


From   Marcos Vinicius <bioestatistico@inbox.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: ANCOVA using only summary data
Date   Thu, 22 Nov 2012 02:17:16 -0800

Thank you David.Helped a lot.
Vinicius.

> -----Original Message-----
> From: dchoaglin@gmail.com
> Sent: Wed, 21 Nov 2012 15:25:56 -0500
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: ANCOVA using only summary data
> 
> Hi, Vinicius.
> 
> Did you mean to say that you would like to compare a continuous
> outcome variable among the 3 groups?
> 
> Do your summary data include the correlation between the outcome and
> the baseline measure within each of the 3 groups?  If so, it may be
> possible to derive the quantities that you need for the analysis of
> covariance (I haven't worked out the details).  If not, the answer is
> No.
> 
> David Hoaglin
> 
> On Wed, Nov 21, 2012 at 11:50 AM, Marcos Vinicius
> <bioestatistico@inbox.com> wrote:
>> Hello,
>> Is there a way to perform ANCOVA using only a summary data ( mean ,N,
>> SD)?  If yes someone could share the stata code ?
>> Many thanks,
>> Vinicius.
>> P.s:I would like to compare a continuous covariate among 3 groups
>> adjusting for baseline measure.
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