Markers of cognitive reserve and dementia incidence in the English Longitudinal Study of Ageing.
Markers of cognitive reserve and dementia incidence in the English Longitudinal Study of Ageing.
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DOI:
10.1192/bjp.2020.54
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发表时间:
2021-05
期刊:
影响因子:
--
通讯作者:
Cadar D
中科院分区:
文献类型:
--
作者:
Almeida-Meza P;Steptoe A;Cadar D
In the current climate of an ageing population, it is imperative to identify preventive measures for dementia. We implemented a multi-faceted index of cognitive reserve (CR) markers and investigated dementia incidence over 15 years of follow-up in a representative sample of the English population. Data were 12,280 participants aged 50+ from the English Longitudinal Study of Ageing, free from dementia at their baseline assessments being either wave 1 (2002–2003), 3 (2006–2007), or 4 (2008–2009), and followed up until wave 8 (2016–2017). CR index was constructed as a composite measure of education, occupation and leisure activities using a standardised questionnaire. Cox proportional hazards regression models were used to estimate the hazard ratios (HR) of dementia in relation to CR levels (low, medium and high) and its components (education, occupation and leisure activities). During the follow-up period, 602 participants aged 56 to 99 developed dementia. Higher levels of CR (HR 0.65, 95% CI 0.48–0.89, p=0.008) were associated with a lower risk of dementia. An individual analysis of its components showed that higher levels of education (HR 0.56, 95% CI 0.36–0.88, p=0.012), occupation (HR 0.72, 95% CI 0.56–0.91, p=0.008) and leisure activities (HR 0.74, 95% CI 0.56–0.99, p=0.047) were predictive of a reduced dementia risk, with the first two components particularly protective in younger participants (<85 years old). This study showed a reduced risk of dementia for individuals with a higher level of CR, represented by higher education, complex occupations, and multifaceted level of leisure activities. Available via UK Data Services (https://discover.ukdataservice.ac.uk).
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