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Re: st: Graphing of multiple meta-analyses

From   Steven Samuels <[email protected]>
To   [email protected]
Subject   Re: st: Graphing of multiple meta-analyses
Date   Sun, 28 Sep 2008 16:32:17 -0400

-metan- will graph its results, so I am not sure why you are transferring data by hand. You can modify the graph (titles, and so on) using any of Stata's -graph- options. You can also combine different graphs using -graph, combine- , but I can't think of a way of understandably displaying 80 of them. You can, however save the summary statistics from each -metan- run and graph these. Type "return list" after a -metan- run to see what is available. In the live example contained in the -help- for -metan, the pooled risk difference is available in r(ES), so you could turn this into a variable

gen rdiff = r(ES)

save the first observation and just the statistics you want, together with an indicator for occupation. Append all of the occupation individual data sets (n=1), and graph from there.


On Sep 28, 2008, at 2:59 PM, Anthony Staines wrote:

Dear all,
I would be grateful for advice on the following question. We are doing a
pooled analysis of a number of case-control studies, mainly looking at
occupational exposures. We have a number of pre-specified analyses, but
we would also like to prepare and graph pooled estimates for about 80
occupational groups. (We are fully aware of the statistical and
inferential issues here.)
At the moment we are running the analyses, (using the metan command) and
manually transferring the individual and pooled OR, study sizes etc..
into a graphical command, to prepare a meta-analysis plot for each one.

We want to do two things - first eliminate this manual transfer step, as
it is error prone. Second prepare graphs containing several of these in
one graph.
I'm not a Stata expert, Carla, who is working on this project knows
Stata better than I do, but we would both be grateful for any
suggestions, hints, or plain instructions,
Best wishes,
Anthony Staines
Anthony Staines, Professor of Health Systems Research,
School of Nursing, Dublin City University, Dublin 9,Ireland.
Tel:- +353 1 700 7807. Mobile:- +353 86 606 9713
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