Change search
ReferencesLink to record
Permanent link

Direct link
IQ and somatic health in late adolescence
Stockholm University, Faculty of Social Sciences, Centre for Social Research on Alcohol and Drugs (SoRAD). Karolinska Institutet, Sweden.
Number of Authors: 3
2014 (English)In: Intelligence, ISSN 0160-2896, E-ISSN 1873-7935, Vol. 44, 155-162 p.Article in journal (Refereed) Published
Abstract [en]

Intelligence quotient (IQ) is associated with mental health in youth onwards, as well as somatic health and longevity later in life. However, little is known about the association with somatic health in youth. We aimed to investigate the cross-sectional association between IQ and a range of somatic diagnoses and health indicators in late adolescence. In a cohort comprising 49321 Swedish men, IQ test performance and health status were recorded at conscription in 1969-70, at ages 18-20. Information on socioeconomic factors in childhood was obtained from the national census. Odds ratios (ORs) were estimated by logistic regression. With adjustment for socioeconomic background, each step decrease in IQ test performance on a nine-point scale was associated with an increased OR for the following somatic diagnoses; impaired hearing (1.14, 1. 1.12-1.16), endocrine disorders (1.13, 1.10-1.17), symptoms and ill-defined conditions (1.11, 1.08-1.14), back pain (1.10, 1.08-1.12), digestive system diseases (1.08,1.05-1.10) and injuries (1.02,1.00-1.05); and a decreased OR for hayfever (0.87, 0.85-0.90) and refractive errors (0.87, 0.86-0.88). IQ was also associated with increased ORs for low physical capacity (1.12, 1.10-1.14), signs of inflammation (1.07, 1.06-1.09) and low self-rated health (1.03, 1.02-1.05). Several diagnoses were not associated with IQ In conclusion, lower IQ at conscription was associated with a higher risk for several diagnoses and indicators of poor health, but the risk was decreased for a few of the diagnoses. The mechanisms underlying the associations presumably differ. However, socioeconomic factors in childhood could not explain the associations. 

Place, publisher, year, edition, pages
2014. Vol. 44, 155-162 p.
Keyword [en]
Cognitive epidemiology, Intelligence, Health, Diagnoses, Adolescence
National Category
URN: urn:nbn:se:su:diva-106444DOI: 10.1016/j.intell.2014.04.002ISI: 000337780000019OAI: diva2:736199


Available from: 2014-08-05 Created: 2014-08-04 Last updated: 2014-08-05Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Hemmingsson, Tomas
By organisation
Centre for Social Research on Alcohol and Drugs (SoRAD)
In the same journal

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: 30 hits
ReferencesLink to record
Permanent link

Direct link