To the Editor: In their study of data extraction errors in meta-analyses that use standardized mean differences (SMDs), Dr Gøtzsche and colleagues1 included our own meta-analysis (referred to as Edmonds et al, 2004).2 However, there is a discrepancy between the data extracted by the authors and those in our meta-analysis.
McGuire H, Edmonds M, Price J. Data Discrepancies in Meta-analyses That Use Standarized Mean Differences. JAMA. 2007;298(19):2261–2263. doi:10.1001/jama.298.19.2261-b
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