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Effect sizes can be log transformed on the fly. This is convenient when
meta-analyzing odds ratios. In this case, two studies have the same direction
of effect if their log(odds ratio) statistics are both positive or negative,
corresponding to odds ratios that are both >1.0 or <1.0.
This transformation is activated through the EFFECTLABEL command. For example,
EFFECTLABEL log(ODDSRATIO) instructs metal to log-transform the ODDSRATIO column
prior to analysis.
meta-analyzing odds ratios. In this case, two studies have the same direction
of effect if their log(odds ratio) statistics are both positive or negative,
corresponding to odds ratios that are both >1.0 or <1.0.
This transformation is activated through the EFFECTLABEL command. For example,
EFFECTLABEL log(ODDSRATIO) instructs metal to log-transform the ODDSRATIO column
prior to analysis.
