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STATISTICS IN MEDICINES tatist. ;19:3127{3131A simple method for converting an odds ratio to e ect sizefor use in meta-analysisSusan Chinn ;yDepartment of Public Health Sciences;King's College;London;5th oor;Capital House;42 Weston Street;London SE1 3QD; systematic review may encompass both odds ratios and mean di erences in continuous separate meta- analysis of each type of outcome results in loss of information and may be is shown that a ln(odds ratio) can be converted to e ect size by dividing by The validity of e ectsize , the estimate of interest divided by the residual standard deviation, depends on comparable variationacross studies. If researchers routinely report residual standard deviation, any subsequent review cancombine both odds ratios and e ect sizes in a single meta- analysis when this is justi ed. Copyright?2000 John Wiley & Sons, INTRODUCTIONMeta- analysis is now used extensively in reviews of randomized controlled trials and obser-vational studies, but the problems include how to compare non-identical outcomes [1].}
Title: A simple method for converting an odds ratio to effect size for use in meta-analysis Created Date: 3/1/1904 5:17:20 AM
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