st: metafunnel command

[Jonathan Sterne <Jonathan.Sterne@bristol.ac.uk>]

A new command, metafunnel, is available. This plots funnel plots: graphical 
displays used to examine whether the results of a meta-analysis may have 
been affected by publication or other types of bias. It uses Stata 8 
graphics, and follows meta-analytic conventions in plotting standard error 
(the measure of study size) on the vertical axis and treatment effect on 
the horizontal axis. Pseudo 95% confidence interval lines are also plotted.

The command may be installed by typing -ssc install metafunnel- within 
Stata. I am grateful to Kit Baum for making it available on the Statistical 
Software Components archive, and to Tom Steichen for helpful comments on 
the command and for writing a dialog, which is automatically downloaded 
from the archive along with the command.

Jonathan Sterne
Department of Social Medicine
University of Bristol, UK


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