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The Stata Journal
Volume 13 Number 3: pp. 574-587



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A short guide and a forest plot command (ipdforest) for one-stage meta-analysis

Evangelos Kontopantelis
NIHR School for Primary Care Research
Institute of Population Health
University of Manchester
Manchester, UK
e.kontopantelis@manchester.ac.uk
David Reeves
Institute of Population Health
University of Manchester
Manchester, UK
david.reeves@manchester.ac.uk
Abstract.  In this article, we describe a new individual patient data meta-analysis postestimation command, ipdforest. The command produces a forest plot following a one-stage meta-analysis with xtmixed or xtmelogit. (These commands have been renamed in Stata 13 to mixed and meqrlogit, respectively; ipdforest is currently not compatible with the new names.) The overall effect is obtained from the preceding mixed-effects regression and the study effects from linear or logistic regressions on each study, which are executed within ipdforest.
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