R help - Jul 2010 - metaplot (rmeta)

Greetings

I have been trying to use metaplot to create a forest plot of my meta-analysis
results.  My data is in the form of ORs, so I've been inputting the ORs as
the point estimate (mn) and the SEs of the logORs as the SE (se).  However,
whilst the point estimates appear to be displayed properly, many of the
confidence intervals go below zero (not possible for an OR, as far as I know).

I think the confidence intervals shown might be simply 1.96 x SE or 2 x SE.  Is
there a way to get meta plot to show the proper 95% CIs for the ORs?

I have tried forestplot, but am having a lot of issues trying to get the columns
to line up correctly, and in labeltext, it doesn't see to want to read the
values I'm listing for the names of the studies. All I get are a changing
list of numbers.

[As a note, since the studies I'm meta-analysing use multi-level regression,
I can't simply input the raw numbers for successes/failures since the ORs
are all adjusted for various factors.]

Thanks!
Kate Snedeker

-- 
Kate Snedeker, PhD
Postdoctoral Fellow
Centre for Public Health and Zoonoses & Department of Population Medicine
MacNabb House
Ontario Veterinary College
University of Guelph
Guelph, Ontario N1G 2W1

Phone: 519-824-4120 x54471
Fax: 519-766-1730
E-mail: snedeker at uoguelph.ca

At 01:11 20/07/2010, Kate Snedeker wrote:
>Greetings
>
>I have been trying to use metaplot to create a forest plot of my 
>meta-analysis results.  My data is in the form of ORs, so I've been 
>inputting the ORs as the point estimate (mn) and the SEs of the 
>logORs as the SE (se).  However, whilst the point estimates appear 
>to be displayed properly, many of the confidence intervals go below 
>zero (not possible for an OR, as far as I know).
Kate, did you really mean that you are entering the OR and the se of 
logOR? If so then I imagine using logOR and the se of logOR would be 
a big advance.

>I think the confidence intervals shown might be simply 1.96 x SE or 
>2 x SE.  Is there a way to get meta plot to show the proper 95% CIs 
>for the ORs?
>
>I have tried forestplot, but am having a lot of issues trying to get 
>the columns to line up correctly, and in labeltext, it doesn't see 
>to want to read the values I'm listing for the names of the studies. 
>All I get are a changing list of numbers.
Posting an example here might help.

>[As a note, since the studies I'm meta-analysing use multi-level 
>regression, I can't simply input the raw numbers for 
>successes/failures since the ORs are all adjusted for various factors.]
>
>Thanks!
>Kate Snedeker
>
>--
>Kate Snedeker, PhD
>Postdoctoral Fellow
>Centre for Public Health and Zoonoses & Department of Population
Medicine
>MacNabb House
>Ontario Veterinary College
>University of Guelph
>Guelph, Ontario N1G 2W1
>
>Phone: 519-824-4120 x54471
>Fax: 519-766-1730
>E-mail: snedeker at uoguelph.ca
Michael Dewey
http://www.aghmed.fsnet.co.uk