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Author: Singh-Manoux, Archana
Resulting in 1 citation.
1. Jokela, Markus
Elovainio, Marko
Singh-Manoux, Archana
Kivimäki, Mika
IQ, Socioeconomic Status, and Early Death: The US National Longitudinal Survey of Youth.
Psychosomatic Medicine 71,3 (April 2009): 322-328
Cohort(s): NLSY79
Publisher: American Psychosomatic Society
Keyword(s): Cognitive Ability; Education; Household Income; I.Q.; Mortality; Parental Influences; Socioeconomic Status (SES)

Permission to reprint the abstract has not been received from the publisher.

OBJECTIVE: To assess whether the association between cognitive ability (IQ) and early mortality is mediated by socioeconomic status (SES) or whether the association between SES and mortality reflects a spurious association caused by IQ. METHODS: The participants were from the US National Longitudinal Survey of Youth (n = 11,321). IQ was assessed at age 16 to 23 years and the participants were followed up to 40 to 47 years of age. RESULTS: Controlling for sex, birth year, race/ethnicity, baseline health, and parental education, higher IQ was associated with lower probability of death (odds ratio (OR) per 1-standard deviation increase in IQ = 0.78, 95% confidence interval (CI) = 0.66, 0.91). This association disappeared (OR = 0.99, 95% CI = 0.81, 1.20) when adjusted for education and household income. Adjustment for IQ had no effect on the association between SES and mortality. These findings were similar in Hispanic, Black, and White/other participants and in women and men. Parental education moderated the IQ-mortality association so that this association was not observed in participants with low parental education. CONCLUSIONS: Low IQ predicts early mortality in the US population and this association is largely explained by SES. The results do not support the alternative hypothesis that the socioeconomic gradient in early mortality would reflect IQ differences.
Bibliography Citation
Jokela, Markus, Marko Elovainio, Archana Singh-Manoux and Mika Kivimäki. "IQ, Socioeconomic Status, and Early Death: The US National Longitudinal Survey of Youth." Psychosomatic Medicine 71,3 (April 2009): 322-328.