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To what extent does IQ 'explain' socio-economic variations in function?
Hans Bosma1, Martin P J van Boxtel, Gertrudis I J M Kempen
1Maastricht University, Social Medicine, Maastricht, The Netherlands. hans.bosma@zw.unimaas.nl
BMC Public Health
|July 27, 2007
Summary
Higher intellectual abilities protect against functional decline, independent of early life factors. These cognitive abilities significantly explain socio-economic differences in aging and quality of life.
Area of Science:
- Gerontology
- Cognitive Science
- Sociology
Background:
- Investigating the protective role of intellectual abilities against functional decline in higher socio-economic groups.
- Examining if intellectual abilities' impact is independent of early life factors like deprivation and low birth weight.
Purpose of the Study:
- To determine if higher intellectual abilities shield higher socio-economic groups from functional decline.
- To assess the independence of intellectual abilities' contribution from early life socio-economic and developmental factors.
Main Methods:
- Prospective cohort study (Maastricht Aging Study - MAAS) with 1211 participants (24-81 years old).
- Baseline cognitive assessment and six-year follow-up measuring quality of life and successful aging (physical, affective, cognitive functioning).
Main Results:
- Lower occupational level correlated with greater functional decline.
- Early life factors had minimal impact on adult socio-economic differences in functional decline.
- Intellectual abilities accounted for over one-third of the association between adult socio-economic status and functional decline, independent of early life factors.
Conclusions:
- Intellectual abilities are crucial for mitigating functional decline and explaining socio-economic disparities in aging.
- Findings highlight intellectual abilities as potential confounders in socio-economic differences in functioning, successful aging, and quality of life.
- Higher intellectual abilities in higher socio-economic groups may contribute to greater mastery, self-efficacy, and effective coping.
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