Cargando…
IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men
The authors evaluated the little-examined association between intelligence (IQ) and injury mortality and, for the first known time, explored the extent to which IQ might explain established socioeconomic inequalities in injury mortality. A nationwide cohort of 1,116,442 Swedish men who underwent IQ...
Autores principales: | , , , , |
---|---|
Formato: | Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2009
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2640161/ https://www.ncbi.nlm.nih.gov/pubmed/19147741 http://dx.doi.org/10.1093/aje/kwn381 |
_version_ | 1782164535125213184 |
---|---|
author | Batty, G. David Gale, Catharine R. Tynelius, Per Deary, Ian J. Rasmussen, Finn |
author_facet | Batty, G. David Gale, Catharine R. Tynelius, Per Deary, Ian J. Rasmussen, Finn |
author_sort | Batty, G. David |
collection | PubMed |
description | The authors evaluated the little-examined association between intelligence (IQ) and injury mortality and, for the first known time, explored the extent to which IQ might explain established socioeconomic inequalities in injury mortality. A nationwide cohort of 1,116,442 Swedish men who underwent IQ testing at about 18 years of age was followed for mortality experience for an average of 22.6 years. In age-adjusted analyses in which IQ scores were classified into 4 groups, relative to the highest scoring category, the hazard ratio in the lowest was elevated for all injury types: poisonings (hazard ratio (HR) = 5.82, 95% confidence interval (CI): 4.25, 7.97), fire (HR = 4.39, 95% CI: 2.51, 7.77), falls (HR = 3.17, 95% CI: 2.19, 4.59), drowning (HR = 3.16, 95% CI: 1.85, 5.39), and road injury (HR = 2.17, 95% CI: 1.91, 2.47). Dose-response effects across the full IQ range were evident (P-trend < 0.001). Control for potential covariates, including socioeconomic position, had little impact on these gradients. When socioeconomic disadvantage—indexed by parental and subject's own occupational social class—was the exposure of interest, IQ explained a sizable portion (19%–86%) of the relation with injury mortality. These findings suggest that IQ may have an important role both in the etiology of injuries and in explaining socioeconomic inequalities in injury mortality. |
format | Text |
id | pubmed-2640161 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-26401612009-02-25 IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men Batty, G. David Gale, Catharine R. Tynelius, Per Deary, Ian J. Rasmussen, Finn Am J Epidemiol Original Contributions The authors evaluated the little-examined association between intelligence (IQ) and injury mortality and, for the first known time, explored the extent to which IQ might explain established socioeconomic inequalities in injury mortality. A nationwide cohort of 1,116,442 Swedish men who underwent IQ testing at about 18 years of age was followed for mortality experience for an average of 22.6 years. In age-adjusted analyses in which IQ scores were classified into 4 groups, relative to the highest scoring category, the hazard ratio in the lowest was elevated for all injury types: poisonings (hazard ratio (HR) = 5.82, 95% confidence interval (CI): 4.25, 7.97), fire (HR = 4.39, 95% CI: 2.51, 7.77), falls (HR = 3.17, 95% CI: 2.19, 4.59), drowning (HR = 3.16, 95% CI: 1.85, 5.39), and road injury (HR = 2.17, 95% CI: 1.91, 2.47). Dose-response effects across the full IQ range were evident (P-trend < 0.001). Control for potential covariates, including socioeconomic position, had little impact on these gradients. When socioeconomic disadvantage—indexed by parental and subject's own occupational social class—was the exposure of interest, IQ explained a sizable portion (19%–86%) of the relation with injury mortality. These findings suggest that IQ may have an important role both in the etiology of injuries and in explaining socioeconomic inequalities in injury mortality. Oxford University Press 2009-03-01 2009-01-15 /pmc/articles/PMC2640161/ /pubmed/19147741 http://dx.doi.org/10.1093/aje/kwn381 Text en American Journal of Epidemiology © 2009 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Contributions Batty, G. David Gale, Catharine R. Tynelius, Per Deary, Ian J. Rasmussen, Finn IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men |
title | IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men |
title_full | IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men |
title_fullStr | IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men |
title_full_unstemmed | IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men |
title_short | IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men |
title_sort | iq in early adulthood, socioeconomic position, and unintentional injury mortality by middle age: a cohort study of more than 1 million swedish men |
topic | Original Contributions |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2640161/ https://www.ncbi.nlm.nih.gov/pubmed/19147741 http://dx.doi.org/10.1093/aje/kwn381 |
work_keys_str_mv | AT battygdavid iqinearlyadulthoodsocioeconomicpositionandunintentionalinjurymortalitybymiddleageacohortstudyofmorethan1millionswedishmen AT galecathariner iqinearlyadulthoodsocioeconomicpositionandunintentionalinjurymortalitybymiddleageacohortstudyofmorethan1millionswedishmen AT tyneliusper iqinearlyadulthoodsocioeconomicpositionandunintentionalinjurymortalitybymiddleageacohortstudyofmorethan1millionswedishmen AT dearyianj iqinearlyadulthoodsocioeconomicpositionandunintentionalinjurymortalitybymiddleageacohortstudyofmorethan1millionswedishmen AT rasmussenfinn iqinearlyadulthoodsocioeconomicpositionandunintentionalinjurymortalitybymiddleageacohortstudyofmorethan1millionswedishmen |