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The impact of social networks and APOE ɛ4 on dementia among older adults: Tests of possible interactions

Conference contribution
Authors Jing Wu
Caroline Hasselgren
Björn Halleröd
Published in 13th Conference of the European Sociological Association (ESA): (Un)Making Europe: Capitalism, Solidarities, Subjectivities, 29th August - 1st September 2017, Athens, Greece
Publication year 2017
Published at Department of Sociology and Work Science
Language en
Links esa13thconference.eu/
Keywords Social networks; APOE ε4; Dementia; Gender; Longitudinal study; Sweden
Subject categories Sociology, Gerontology, specializing in Medical and Health Sciences, Public Health, Global Health, Social Medicine and Epidemiology

Abstract

Background: Emerging evidence suggests that social networks may protect against the development of dementia among older adults. In this study, we analysed the association between social networks, the apolipoprotein E (APOE) ε4 allele, and dementia. We also investigated whether there were gender-specific patterns in this respect. Methods: The analyses used population-based longitudinal data from Gothenburg, Sweden: the H70 Birth Cohort Study and the Prospective Population Study on Women (PPSW). A total of 580 individuals born in 1930 underwent semi-structured neuropsychiatric examinations in 2000–2001. Follow-up examinations were carried out in 2005–2006 and 2009–2010. The timing of dementia onset was analysed using Cox proportional hazards regression. Results: The presence of the APOE ε4 allele affected the risk of developing dementia in both genders, though this did not reach statistical significance among men due to smaller sample size. Among women, distant social networks had a protective effect on dementia, while among men the significant associations between close social networks and dementia did not remain after controlling for covariates. Significant interactions between social networks and the APOE ε4 allele were not found. Conclusions: Strong social networks do not seem to moderate the increased risk of dementia implied by the APOE ε4 allele. Nevertheless, our results underline the importance of a strong social network in postponing dementia onset, and indicate that its impact varies between men and women.

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