Résumé :
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[BDSP. Notice produite par INIST-CNRS IlR0x8mq. Diffusion soumise à autorisation]. Objective : To examine the role of potential mediating factors in explaining the IQ-mortality relation. Design, setting and participants : A total of 4316 male former Vietnam-era US army personnel with IQ test results at entry into the service in late adolescence/early adulthood in the 1960/1970s (mean age at entry 20.4 years) participated in a telephone survey and medical examination in middle age (mean age 38.3 years) in 1985-6. They were then followed up for mortality experience for 15 years. Main results : In age-adjusted analyses, higher IQ scores were associated with reduced rates of total mortality (hazard ratio (HR) per SD increase in IQ 0.71 ; 95% Cl 0.63 to 0.81). This relation did not appear to be heavily confounded by early socioeconomic position or ethnicity. The impact of adjusting for some potentially mediating risk indices measured in middle age on the IQ-mortality relation (marital status, alcohol consumption, systolic and diastolic blood pressure, pulse rate, blood glucose, body mass index, psychiatric and somatic illness at medical examination) was negligible (
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