Childhood socio-economic status modifies the association between intellectual abilities at age 20 and mortality in later life
Childhood socio-economic status modifies the association between intellectual abilities at age 20 and mortality in later life
Background: People who score poorly in intellectual ability tests have shorter life expectancy. We studied whether this association is different in people from different socio-economic backgrounds.
Methods: We studied the mortality of 2786 men born in Helsinki, Finland, during 1934-44, who as military conscripts underwent a standardised intellectual ability test comprising verbal, visuospatial and arithmetic reasoning subtests. Mortality data came from the Finnish Death Register.
Results: Comparing men in the lowest and highest test score fourths, hazard ratios for all-cause mortality were 1.9 (95% confidence interval 1.4-2.5) for verbal, 2.2 (1.6-3.0) for visuospatial and 1.9 (1.4-2.5) for arithmetic reasoning, corresponding to 2.6, 3.4 and 2.6 excess years of life lost, respectively. Associations were similar for cardiovascular and non-cardiovascular mortality. Intellectual ability scores were stronger predictors in men who grew up in middle class families. Compared with middle class men in the highest fourth of visuospatial reasoning score, middle class men in the lowest fourth lost 6.5 years of life, while men from manual workers- families in the highest fourth lost 2.8 years and men in the lowest fourth lost 5.6 years.
Conclusions: High intellectual ability in men aged 20 protects from mortality in later life. This effect is stronger in men who grew up in middle class as compared with manual workers- families. We suggest that early life conditions that are unfavourable to development of cognitive abilities negate the life expectancy benefits of being born into a more affluent family.
intelligence, cognitive function, mortality, death, socio-economic status
963-969
Kajantie, Eero
d68d55b6-6df1-4195-a914-44c738a6db93
Raikkonen, Katri
7f44cbef-84f3-4d77-9ccc-f026ce537dd8
Henriksson, Markus
a2053763-2d31-4ec1-badc-479e469c5365
Forsa, Tom
d1956e57-e8a3-475f-8439-e09f79b9783f
Heinonen, Kati
46bb57d0-1c33-4cdd-badf-d38a5fc61200
Pesonen, Anu-Katriina
8cc53fef-f713-425e-bd01-8f1c53842351
Leskinen, Jukka T.
5701eb77-f826-4096-aa27-83c8975b3685
Laaksonen, Ilmo
6d03eed7-75be-4bbe-94f5-e8da7aaf3daa
Paile-Hyvarinen, Maria
d52a542b-21e2-4545-aae5-ecc86a6f66f7
Osmond, Clive
2677bf85-494f-4a78-adf8-580e1b8acb81
Barker, David J.P.
5c773838-b094-4ac1-999b-b5869717f243
Eriksson, Johan G.
eb96b1c5-af07-4a52-8a73-7541451d32cd
November 2010
Kajantie, Eero
d68d55b6-6df1-4195-a914-44c738a6db93
Raikkonen, Katri
7f44cbef-84f3-4d77-9ccc-f026ce537dd8
Henriksson, Markus
a2053763-2d31-4ec1-badc-479e469c5365
Forsa, Tom
d1956e57-e8a3-475f-8439-e09f79b9783f
Heinonen, Kati
46bb57d0-1c33-4cdd-badf-d38a5fc61200
Pesonen, Anu-Katriina
8cc53fef-f713-425e-bd01-8f1c53842351
Leskinen, Jukka T.
5701eb77-f826-4096-aa27-83c8975b3685
Laaksonen, Ilmo
6d03eed7-75be-4bbe-94f5-e8da7aaf3daa
Paile-Hyvarinen, Maria
d52a542b-21e2-4545-aae5-ecc86a6f66f7
Osmond, Clive
2677bf85-494f-4a78-adf8-580e1b8acb81
Barker, David J.P.
5c773838-b094-4ac1-999b-b5869717f243
Eriksson, Johan G.
eb96b1c5-af07-4a52-8a73-7541451d32cd
Kajantie, Eero, Raikkonen, Katri, Henriksson, Markus, Forsa, Tom, Heinonen, Kati, Pesonen, Anu-Katriina, Leskinen, Jukka T., Laaksonen, Ilmo, Paile-Hyvarinen, Maria, Osmond, Clive, Barker, David J.P. and Eriksson, Johan G.
(2010)
Childhood socio-economic status modifies the association between intellectual abilities at age 20 and mortality in later life.
Journal of Epidemiology and Community Health, 64 (11), .
(doi:10.1136/jech.2009.086967).
Abstract
Background: People who score poorly in intellectual ability tests have shorter life expectancy. We studied whether this association is different in people from different socio-economic backgrounds.
Methods: We studied the mortality of 2786 men born in Helsinki, Finland, during 1934-44, who as military conscripts underwent a standardised intellectual ability test comprising verbal, visuospatial and arithmetic reasoning subtests. Mortality data came from the Finnish Death Register.
Results: Comparing men in the lowest and highest test score fourths, hazard ratios for all-cause mortality were 1.9 (95% confidence interval 1.4-2.5) for verbal, 2.2 (1.6-3.0) for visuospatial and 1.9 (1.4-2.5) for arithmetic reasoning, corresponding to 2.6, 3.4 and 2.6 excess years of life lost, respectively. Associations were similar for cardiovascular and non-cardiovascular mortality. Intellectual ability scores were stronger predictors in men who grew up in middle class families. Compared with middle class men in the highest fourth of visuospatial reasoning score, middle class men in the lowest fourth lost 6.5 years of life, while men from manual workers- families in the highest fourth lost 2.8 years and men in the lowest fourth lost 5.6 years.
Conclusions: High intellectual ability in men aged 20 protects from mortality in later life. This effect is stronger in men who grew up in middle class as compared with manual workers- families. We suggest that early life conditions that are unfavourable to development of cognitive abilities negate the life expectancy benefits of being born into a more affluent family.
This record has no associated files available for download.
More information
Published date: November 2010
Keywords:
intelligence, cognitive function, mortality, death, socio-economic status
Organisations:
Dev Origins of Health & Disease
Identifiers
Local EPrints ID: 79891
URI: http://eprints.soton.ac.uk/id/eprint/79891
ISSN: 0143-005X
PURE UUID: 5ae02cd0-f794-4aff-9cbc-ecb0145190d6
Catalogue record
Date deposited: 22 Mar 2010
Last modified: 14 Mar 2024 02:38
Export record
Altmetrics
Contributors
Author:
Eero Kajantie
Author:
Katri Raikkonen
Author:
Markus Henriksson
Author:
Tom Forsa
Author:
Kati Heinonen
Author:
Anu-Katriina Pesonen
Author:
Jukka T. Leskinen
Author:
Ilmo Laaksonen
Author:
Maria Paile-Hyvarinen
Author:
David J.P. Barker
Author:
Johan G. Eriksson
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics