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Correction |

Data Error in: Data Extraction Errors in Meta-analyses That Use Standardized Mean Differences FREE

JAMA. 2007;298(19):2264. doi:10.1001/jama.298.19.2264-a.
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Data Error: In the Review article entitled “Data Extraction Errors in Meta-analyses That Use Standardized Mean Differences” published in the July 25, 2007, issue of JAMA (2007;298:430-437), Figure 4 included incorrect data. The reported point estimate and its 95% confidence interval for the meta-analysis standardized mean differences “−0.74 (−0.98 to −0.49)” for the Edmonds et al article should have read “−0.77 (−1.26 to −0.28).” The error was caused by a wrong label in the Cochrane Library at the time of the study. A meta-analysis was stated to have been done with a random-effects model; however, it was done with a fixed-effect model. The Cochrane Library no longer contains this error.

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