Association between birth weight and educational attainment : an individual-based pooled analysis of nine twin cohorts

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Jelenkovic , A , Mikkonen , J , Martikainen , P , Latvala , A , Yokoyama , Y , Sund , R , Vuoksimaa , E , Rebato , E , Sung , J , Kim , J , Lee , J , Lee , S , Stazi , M A , Fagnani , C , Brescianini , S , Derom , C A , Vlietinck , R F , Loos , R J F , Krueger , R F , Mcgue , M , Pahlen , S , Nelson , T L , Whitfield , K E , Brandt , I , Nilsen , T S , Harris , J R , Cutler , T L , Hopper , J L , Tarnoki , A D , Tarnoki , D L , Sorensen , T I A , Kaprio , J & Silventoinen , K 2018 , ' Association between birth weight and educational attainment : an individual-based pooled analysis of nine twin cohorts ' , Journal of Epidemiology & Community Health , vol. 72 , no. 9 , pp. 832-837 . https://doi.org/10.1136/jech-2017-210403

Title: Association between birth weight and educational attainment : an individual-based pooled analysis of nine twin cohorts
Author: Jelenkovic, Aline; Mikkonen, Janne; Martikainen, Pekka; Latvala, Antti; Yokoyama, Yoshie; Sund, Reijo; Vuoksimaa, Eero; Rebato, Esther; Sung, Joohon; Kim, Jina; Lee, Jooyeon; Lee, Sooji; Stazi, Maria A.; Fagnani, Corrado; Brescianini, Sonia; Derom, Catherine A.; Vlietinck, Robert F.; Loos, Ruth J. F.; Krueger, Robert F.; Mcgue, Matt; Pahlen, Shandell; Nelson, Tracy L.; Whitfield, Keith E.; Brandt, Ingunn; Nilsen, Thomas S.; Harris, Jennifer R.; Cutler, Tessa L.; Hopper, John L.; Tarnoki, Adam D.; Tarnoki, David L.; Sorensen, Thorkild I. A.; Kaprio, Jaakko; Silventoinen, Karri
Contributor: University of Helsinki, Population Research Unit (PRU)
University of Helsinki, Academic Disciplines of the Faculty of Social Sciences
University of Helsinki, Academic Disciplines of the Faculty of Social Sciences
University of Helsinki, Institute for Molecular Medicine Finland
University of Helsinki, Research Units of the Faculty of Social Sciences
University of Helsinki, Institute for Molecular Medicine Finland
University of Helsinki, Institute for Molecular Medicine Finland
University of Helsinki, Academic Disciplines of the Faculty of Social Sciences
Date: 2018-09
Language: eng
Number of pages: 6
Belongs to series: Journal of Epidemiology & Community Health
ISSN: 0143-005X
URI: http://hdl.handle.net/10138/310200
Abstract: Background There is evidence that birth weight is positively associated with education, but it remains unclear whether this association is explained by familial environmental factors, genetic factors or the intrauterine environment. We analysed the association between birth weight and educational years within twin pairs, which controls for genetic factors and the environment shared between co-twins. Methods The data were derived from nine twin cohorts in eight countries including 6116 complete twin pairs. The association between birth weight and educational attainment was analysed both between individuals and within pairs using linear regression analyses. Results In between-individual analyses, birth weight was not associated with educational years. Within-pairs analyses revealed positive but modest associations for some sex, zygosity and birth year groups. The greatest association was found in dizygotic (DZ) men (0.65 educational years/kg birth weight, p=0.006); smaller effects of 0.3 educational years/kg birth weight were found within monozygotic (MZ) twins of both sexes and opposite-sex DZ twins. The magnitude of the associations differed by birth year in MZ women and opposite-sex DZ twins, showing a positive association in the 1915-1959 birth cohort but no association in the 1960-1984 birth cohort. Conclusion Although associations are weak and somewhat inconsistent, our results suggest that intrauterine environment may play a role when explaining the association between birth weight and educational attainment.
Subject: ACADEMIC-ACHIEVEMENT
COGNITIVE FUNCTION
BEHAVIOR PROBLEMS
GESTATIONAL-AGE
FOLLOW-UP
HEALTH
CHILDHOOD
OUTCOMES
TRAITS
FETAL
3142 Public health care science, environmental and occupational health
5141 Sociology
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