Article,

How to read a meta-analysis?.

, and .
La Revue de médecine interne / fondée ... par la Société nationale francaise de médecine interne, 35 (4): 250-8 (April 2014)Critical appraisal; Introductori; Metaanàlisi.
DOI: 10.1016/j.revmed.2013.07.011

Abstract

Meta-analysis is aimed at assessing an exhaustive, unbiased, reproducible, quantified and accurate synthesis of a research problem. It is sustained by a systematic review of the literature and has statistical particularities. Sources of error and bias are numerous. In this paper, we describe them following the methodology steps of a well-conducted meta-analysis. Causes of divergent conclusions of meta-analyses are described and illustrated with the example of cancer risk assessment in TNF inhibitor-treated rheumatoid arthritis patients. Eventually, this article provides key-points to help readers to detect sources of error and bias in meta-analyses.

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