Contribution of IQ in young adulthood to the associations of education and occupation with cognitive ability in older age

Autor: Insa Feinkohl, Petra Kozma, Friedrich Borchers, Simone J. T. van Montfort, Jochen Kruppa, Georg Winterer, Claudia Spies, Tobias Pischon
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: BMC Geriatrics, Vol 21, Iss 1, Pp 1-10 (2021)
Druh dokumentu: article
ISSN: 1471-2318
DOI: 10.1186/s12877-021-02290-y
Popis: Abstract Background Studies suggest that a higher education and occupation are each associated with a higher late-life cognitive ability, but their inter-relationships in their association with cognitive ability and the contribution of peak IQ in young adulthood (‘pre-morbid IQ’) often remain unclear. Methods Cross-sectional analysis of 623 participants aged ≥65 years of the BioCog study. Education was coded according to the International Standard Classification of Education (ISCED; range 1 to 6). Occupation was coded as ‘semi/unskilled’, ‘skilled manual’, ‘skilled non-manual’, ‘managerial’, ‘professional’. A summary score of global ability (‘g’) was constructed from six cognitive tests. Pre-morbid IQ was estimated from vocabulary. The Geriatric Depression Scale assessed symptoms of depression. Age- and sex-adjusted analyses of covariance were performed. Results Education (partial eta2 0.076; p
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