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RE: st: RE: Graphing limitations / questions


From   "b. water" <barleywater@hotmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: RE: Graphing limitations / questions
Date   Sun, 28 Nov 2004 16:01:08 +0000

Thanks Tom. It took me some time to understand what you are trying to say in relation to my query but unfortunately I still do not understand what you are trying to get at. Please bear with me.

I do understand (and know) that metan command would produce effect size and its confidence interval. However, what I am hoping to achieve (and I've to use Arcus package at the moment to accomplish it) is to generate some sort of a forest plot of various OR's (and their respective CI's) generated from several metan runs, for visual comparison in a single diagram. I am currentlly looking at the metan ado file to see whether there is something that i can use to generate the forest plot that I want (I suspect none but will let listers know).

Kind regards,
bw




From: "Steichen, Thomas J." <SteichT@rjrt.com>
Reply-To: statalist@hsphsun2.harvard.edu
To: <statalist@hsphsun2.harvard.edu>
Subject: RE: st: RE: Graphing limitations / questions
Date: Tue, 23 Nov 2004 13:16:12 -0500

b. water writes (in part):

> I checked metan's help file as well as the STB. The
> command does not allow metan of odds ratios and their CI's

True enough, but it does allow analysis of effect sizes (ES) and
their standard errors SE(ES).

For OR's with 95% CI = (LL, UL):

   ES = log(OR)
   SE(ES) = (ln(UL) - ln(LL)) / 2 / 1.96

If your CI is other than a 95%, adjust the 1.96 appropriately.

Tom


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