G. David Batty|Catharine R. Gale|Per Tynelius|Ian J. Deary|Finn Rasmussen
IQ in Early Adulthood, Socioeconomic Position, and Unintentional Injury Mortality by Middle Age: A Cohort Study of More Than 1 Million Swedish Men
MRC/CSO Social and Public Health Sciences Unit|University of Glasgow
authors evaluated littleexamined association intelligence iq injury mortality first known time explored extent iq might explain established socioeconomic inequalities injury mortality nationwide cohort 1116442 swedish men underwent iq testing 18 years age followed mortality experience average 226 years ageadjusted analyses iq scores classified 4 groups relative highest scoring category hazard ratio lowest elevated injury types poisonings hazard ratio hr 582 95 confidence interval ci 425 797 fire hr 439 95 ci 251 777 falls hr 317 95 ci 219 459 drowning hr 316 95 ci 185 539 road injury hr 217 95 ci 191 247 doseresponse effects across full iq range evident ptrend 0001 control potential covariates including socioeconomic position little impact gradients socioeconomic disadvantage indexed parental subjects occupational social class exposure interest iq explained sizable portion 1986 relation injury mortality findings suggest iq may important role etiology injuries explaining socioeconomic inequalities injury mortality