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American Journal of Epidemiology Advance Access originally published online on March 22, 2006
American Journal of Epidemiology 2006 163(9):870-872; doi:10.1093/aje/kwj134
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American Journal of Epidemiology Copyright © 2006 by the Johns Hopkins Bloomberg School of Public Health All rights reserved; printed in U.S.A.

Letter to the Editor

RE: "DURATION OF BREASTFEEDING AND RISK OF OVERWEIGHT: A META-ANALYSIS"

Maria A. Quigley

National Perinatal Epidemiology Unit, Oxford University, Headington, Oxford OX3 7LF, United Kingdom

(e-mail: maria.quigley@npeu.ox.ac.uk)

The first 10% of the full text of this article appears below.

In a recent paper, Harder et al. (1Go) presented results from a meta-analysis of the association between duration of breastfeeding and risk of overweight. In a meta-analysis of linear trends, 1 month of breastfeeding was associated with a 4 percent decrease in risk of overweight (odds ratio (OR) = 0.96, 95 percent confidence interval (CI): 0.94, 0.98). Significant heterogeneity was evident. Below, I propose several possible causes of this heterogeneity and suggest that a meta-analysis might have been inappropriate.

The age at which the outcome was measured . . . [Full Text of this Article]


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