uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Does age at adoption and geographic origin matter? A national cohort study of cognitive test performance in adult inter-country adoptees
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Women's and Children's Health.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Child and Adolescent Psychiatry.
Show others and affiliations
2008 (English)In: Psychological Medicine, ISSN 0033-2917, E-ISSN 1469-8978, Vol. 38, no 12, 1803-1814 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Inter-country adoptees run risks of developmental and health-related problems. Cognitive ability is one important indicator of adoptees' development, both as an outcome measure itself and as a potential mediator between early adversities and ill-health. The aim of this study was to analyse relations between proxies for adoption-related circumstances and cognitive development. Method: Results from global and verbal scores of cognitive tests at military conscription (mandatory for all Swedish men during these years) were compared between three groups (born 1968-1976): 746 adoptees born in South Korea, 1548 adoptees born in other non-Western countries and 330 986 non-adopted comparisons in the same birth cohort. Information about age at adoption and parental education was collected from Swedish national registers. RESULTS: South Korean adoptees had higher global and verbal test scores compared to adoptees from other non-European donor countries. Adoptees adopted after age 4 years had lower test scores if they were not of Korean ethnicity, while age did not influence test scores in South Koreans or those adopted from other non-European countries before the age of 4 years. Parental education had minor effects on the test performance of the adoptees - statistically significant only for non-Korean adoptees' verbal test scores - but was prominently influential for non-adoptees. CONCLUSIONS: Negative pre-adoption circumstances may have persistent influences on cognitive development. The prognosis from a cognitive perspective may still be good regardless of age at adoption if the quality of care before adoption has been 'good enough' and the adoption selection mechanisms do not reflect an overrepresentation of risk factors - both requirements probably fulfilled in South Korea.

Place, publisher, year, edition, pages
2008. Vol. 38, no 12, 1803-1814 p.
Keyword [en]
Cohort study, cognitive performance, intelligence, inter-country adoption
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-122351DOI: 10.1017/S0033291708002766ISI: 000261549000015PubMedID: 18307828OAI: oai:DiVA.org:uu-122351DiVA: diva2:309790
Available from: 2010-04-08 Created: 2010-04-08 Last updated: 2016-05-02

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Lindblad, Finn
By organisation
Department of Women's and Children's HealthChild and Adolescent Psychiatry
In the same journal
Psychological Medicine
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 177 hits
ReferencesLink to record
Permanent link

Direct link