Abstract

Horta et al (1) assembled a meta-analytic dataset on an important question: the effect of breastfeeding on children's cognitive test scores. Using a rigorous set of inclusion criteria to screen out poor-quality studies (e.g. those that had no comparison group; those that did not use standard cognitive tests), they estimated that children in the groups who were breastfed had on average a 3.44-point higher IQ score. Their meta-analysis was cited prominently in a recent Lancet review on the effects of breastfeeding (2). This article is protected by copyright. All rights reserved.

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