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Feature Articles, Books, and Documents
April-May 2002

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Feature Items:

Erik Lykke Mortensen, Kim Fleischer Michaelsen, Stephanie A. Sanders, and June Machover Reinisch

The Association Between Duration of Breastfeeding and Adult Intelligence. (... one of a very small number of studies [to date] that have looked at the relationship between breastfeeding and intelligence in adults. In an effort to overcome methodological and interpretation problems associated with other studies in this area, the authors describe the association between duration of breastfeeding and adult intelligence, applying 2 different intelligence measures, in 2 nonoverlapping samples from a perinatal cohort with a wide range of potentially confounding variables collected prospectively. And, in both samples, intelligence was assessed in young adulthood, an age when cognitive functioning is optimal and intelligence test scores are highly stable.
The authors collected information from a sample of 490 men and 483 women ranging in age from 20-34 at the time they completed the Wechsler Adult Intelligence Scale. The authors also collected data from a further sample of 2280 men ranging in age from 17-26 when they completed another intelligence test--the Børge Priens Prøve. The individuals that made up both samples had been born at the Copenhagen University Hospital [Denmark] between October 1959 and December 1961.
Based on the data they collected, the authors observed a positive significant association between duration of breastfeeding and intelligence in young adults. These results indicate that breastfeeding may have long-term positive effects on cognitive and intellectual development. The nutrients in breast milk, behavioral factors, and factors associated with choice of feeding method may all contribute to the positive association. Other keywords and phrases -- bottlefed, BPP, formula, IQ, WAIS -- from the text of the article)

JAMA--The Journal of the American Medical Association Volume 287, Number 18 (May 8, 2002): 2365-2371.

**The complete text of the article is currently available through the Web site of JAMA--The Journal of the American Medical Association**

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