| Titre : | IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age : A Cohort Study of More Than 1 Million Swedish Men. (2009) |
| Auteurs : | BATTY (Gdavid) : GBR. Mrc Social and Public Health Sciences Unit. University of Glasgow. Glasgow. ; Ian-J DEARY ; GALE (Catharine-R) : GBR. Mrc Epidemiology Resource Centre. University of Southampton. Southampton. ; Finn RASMUSSEN ; Per TYNELIUS ; Centre for Cognitive Ageing and Cognitive Epidemiology. Department of Psychology. University of Edinburgh. Edinburgh. GBR |
| Type de document : | Article |
| Dans : | American journal of epidemiology (vol. 169, n° 5, 2009) |
| Pagination : | 606-615 |
| Langues: | Anglais |
| Mots-clés : | Traumatisme ; Adulte ; Evolution ; Facteur socioéconomique ; Europe sociale ; Accident ; Mortalité ; Epidémiologie ; Suède ; Intelligence ; Quotient intellectuel ; Homme ; Europe |
| Résumé : | [BDSP. Notice produite par INIST-CNRS D8nlR0x8. Diffusion soumise à autorisation]. 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 (Cl) : 4.25,7.97), fire (HR=4.39,95% Cl : 2.51,7.77), falls (HR=3.17,95% Cl : 2.19,4.59), drowning (HR=3.16,95% Cl : 1.85,5.39), and road injury (HR=2.17,95% Cl : 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. |
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