期刊
INTELLIGENCE
卷 63, 期 -, 页码 45-50出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.intell.2017.05.002
关键词
Childhood intelligence; IQ; All-cause mortality; SMS1947; Sex differences
资金
- UK cross council Lifelong Health and Wellbeing Initiative [MRCG1001401]
- Biotechnology and Biological Sciences Research Council (BBSRC)
- Medical Research Council (MRC) [MR/K026992/1]
- Medical Research Council [G1001401, MR/K026992/1] Funding Source: researchfish
- MRC [G1001401] Funding Source: UKRI
Objective: To extend previous literature that suggests higher IQ in youth is associated with living longer. Previous studies have been unable to assess reliably whether the effect differs across sexes and ages of death, and whether the effect is graded across different levels of IQ. Methods: We test IQ-survival associations in 94% of the near-entire population born in Scotland in 1936 who took an IQ test at age 11 (n = 70,805) and were traced in a 68-year follow-up. Results: Higher IQ at age 11 years was associated with a lower risk of death (HR = 0.80, 95% CI = 0.79, 0.81). The decline in risk across categories of IQ scores was graded across the full range with the effect slightly stronger in women (HR = 0.79, 95% CI = 0.77, 0.80) than in men (HR = 0.82, 95% CI = 0.81, 0.84). Higher IQ had a significantly stronger association with death before and including age 65 (HR = 0.76, 95% CI = 0.74, 0.77) than in those participants who died at an older age (HR = 0.79, 95% CI = 0.78, 0.80). Conclusions: Higher childhood IQ is associated with lower risk of all-cause mortality in both men and women. This is the only near-entire population study to date that examines the association between childhood IQ and mortality across most of the human life course.
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