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Education in Twins and Their Parents Across Birth Cohorts Over 100 years: An Individual-Level Pooled Analysis of 42-Twin Cohorts
Department of Social Research, University of Helsinki, Helsinki, Finland; Osaka University Graduate School of Medicine, Osaka University, Osaka, Japan.
Örebro University, School of Law, Psychology and Social Work. Department of Psychology, University of Southern California, Los Angeles CA, USA.ORCID iD: 0000-0001-8768-6954
Institute for Molecular Medicine FIMM, Helsinki, Finland; Department of Public Health, University of Helsinki, Helsinki, Finland.
Number of Authors: 101
2017 (English)In: Twin Research and Human Genetics, ISSN 1832-4274, E-ISSN 1839-2628, Vol. 20, no 5, 395-405 p.Article in journal (Refereed) Published
Abstract [en]

Whether monozygotic (MZ) and dizygotic (DZ) twins differ from each other in a variety of phenotypes is important for genetic twin modeling and for inferences made from twin studies in general. We analyzed whether there were differences in individual, maternal and paternal education between MZ and DZ twins in a large pooled dataset. Information was gathered on individual education for 218,362 adult twins from 27 twin cohorts (53% females; 39% MZ twins), and on maternal and paternal education for 147,315 and 143,056 twins respectively, from 28 twin cohorts (52% females; 38% MZ twins). Together, we had information on individual or parental education from 42 twin cohorts representing 19 countries. The original education classifications were transformed to education years and analyzed using linear regression models. Overall, MZ males had 0.26 (95% CI [0.21, 0.31]) years and MZ females 0.17 (95% CI [0.12, 0.21]) years longer education than DZ twins. The zygosity difference became smaller in more recent birth cohorts for both males and females. Parental education was somewhat longer for fathers of DZ twins in cohorts born in 1990-1999 (0.16 years, 95% CI [0.08, 0.25]) and 2000 or later (0.11 years, 95% CI [0.00, 0.22]), compared with fathers of MZ twins. The results show that the years of both individual and parental education are largely similar in MZ and DZ twins. We suggest that the socio-economic differences between MZ and DZ twins are so small that inferences based upon genetic modeling of twin data are not affected.

Place, publisher, year, edition, pages
Cambridge University Press, 2017. Vol. 20, no 5, 395-405 p.
Keyword [en]
twins, zygosity, education, parental education
National Category
Obstetrics, Gynecology and Reproductive Medicine Medical Genetics
Identifiers
URN: urn:nbn:se:oru:diva-62067DOI: 10.1017/thg.2017.49ISI: 000412597600005PubMedID: 28975875OAI: oai:DiVA.org:oru-62067DiVA: diva2:1153408
Funder
Swedish Heart Lung Foundation
Note

Funding Agencies:

CODATwins project (Academy of Finland)  266592 

National Health and Medical Research Council  1079102 

National Institutes of Health  R01 HD068435  R01 MH062375  1R01ESO15150-01  R21 AG039572  AA023322  HD081437  NIA R01 AG018384  R01 AG018386  R01 AG022381  R01 AG022982 

California Tobacco-Related Disease Research Program  7RT-0134H  8RT-0107H  6RT-0354H 

National Institute on Aging  1RO1-AG13662-01A2 

Swedish Research Council through the Swedish Initiative for Research on Microdata in the Social And Medical Sciences (SIMSAM)  340-2013-5867 

Stockholm County Council (ALF)  

Swedish Asthma and Allergy Association's Research Foundation  

NIDA  DA011015 

Longitudinal Twin Study  HD10333 

Fund of Scientific Research, Flanders and Twins  

ENGAGE European Network for Genetic and Genomic Epidemiology  201413 

National Institute of Alcohol Abuse and Alcoholism  AA-12502  AA-00145  AA-09203 

Academy of Finland Center of Excellence in Complex Disease Genetics  213506  129680 

Academy of Finland  100499  205585  118555  141054  265240  263278  264146 

Cancer Research UK  C1418/A7974 

Medexpert Ltd., Budapest, Hungary  

Global Research Network Program of the National Research Foundation  NRF 2011-220-E00006 

European Research Council (ERC)  240994 

Michigan State University  

National Institute of Mental Health (NIMH)  R01-MH081813  R01-MH0820-54  R01-MH092377-02  R21-MH070542-01  R03-MH63851-01 

Eunice Kennedy Shriver National Institute for Child Health and Human Development (NICHD)  R01-HD066040 

MSU Foundation  11-SPG-2518 

Fundacion Seneca  

Regional Agency for Science and Technology, Murcia, Spain  08633/PHCS/08  15302/PHCS/10  19479/PI/14 

Ministry of Science and Innovation, Spain  PSI2009-11560  PSI2014-56680-R 

MagW/ZonMW  904-61-090  985-10-002  912-10-020  904-61-193  480-04-004  463-06-001  451-04-034  400-05-717  Addiction-31160008  Middelgroot-911-09-032  Spinozapremie 56-464-14192 

VU University's Institute for Health and Care Research (EMGO+)  

European Research Council  ERC - 230374 

Avera Institute, Sioux Falls, South Dakota (USA)  

National Research Foundation of Korea  NRF-371-2011-1 B00047 

Krkkale University Research Grant  2009/43 

TUBITAK  114C117 

Cooperative Studies Program of the Office of Research & Development of the United States Department of Veterans Affairs  

Japan Society for the Promotion of Science  15H05105 

National Institute of Mental Health  R01 MH58354 

JSPS KAKENHI JP  23593419  24792601  26671010  24590695  26293128  16K15385  16K15978  16K15989  16H03261    5T32DA017637-11    POCI/DES/56834/2004    NIH RC2 HL103416 

Available from: 2017-10-30 Created: 2017-10-30 Last updated: 2018-01-13Bibliographically approved

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