The influence of birth size on intelligence in healthy children

Broekman, Birit F. P. and Chan, Yiong-Huak and Chong, Yap-Seng and Quek, Swee-Chye and Fung, Daniel and Low, Yen-Ling and Ooi, Yoon-Phaik and Gluckman, Peter D. and Meaney, Michael J. and Wong, Tien-Yin and Saw, Seang-Mei. (2009) The influence of birth size on intelligence in healthy children. Pediatrics, 123 (6). e1011-6.

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Birth parameters have been hypothesized to have an influence on IQ. However, studies within the range of normal birth size have been sparse. With this study we examined the associations between birth length, birth weight, head circumference, and gestational age within the normal birth size range in relation to childhood IQ in Asian children.; A cohort of 1979 of 2913 Asian children aged 7 to 9 years, recruited from 3 schools in Singapore, were followed yearly from 1999 onward. Birth parameters were recorded by health personnel. Childhood IQ was measured with the Raven's Standard Progressive Matrices at ages 8 to 12.; The mean IQ score across the sample (n = 1645) was 114.2. After controlling for multiple confounders for every 1-cm increment in birth length, 1 kg in birth weight, or 1 cm in head circumference, there was a corresponding increase in IQ of 0.49 points (P for trend < .001), 2.19 points (P for trend = .007) and .62 points (P for trend = .003), respectively. These associations persisted even after exclusion of premature children and children with extreme weights and head circumferences.; Longer birth length, higher birth weight, or larger head circumferences within the normal birth size range are associated with higher IQ scores in Asian children. Our results suggest that antenatal factors reflected in altered rates of growth but within the normative range of pregnancy experiences play a role in generating cognitive potential. This has implications for targeting early intervention and preventative programs.
Faculties and Departments:07 Faculty of Psychology
UniBasel Contributors:Ooi, Yoon Phaik
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Academy of Pediatrics
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:29 Nov 2017 08:09
Deposited On:29 Nov 2017 08:09

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