Using health check data to understand risks for dementia and cognitive impairment among Torres Strait Islander and Aboriginal peoples in northern Queensland—a data linkage study

Thompson, Fintan, Russell, Sarah G, Harriss, Linton, Esterman, Adrian, Taylor, Sean, Quigley, Rachel, Strivens, Edward, and McDermott, Robyn (2022) Using health check data to understand risks for dementia and cognitive impairment among Torres Strait Islander and Aboriginal peoples in northern Queensland—a data linkage study. Frontiers in Public Health, 10. 3389.

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Abstract

Objective: High rates of dementia are evident in First Nations populations, and modifiable risk factors may be contributing to this increased risk. This study aimed to use a longitudinal dataset to gain insights into the long-term risk and protective factors for dementia and cognitive impairment not dementia (CIND) in a Torres Strait Islander and Aboriginal population in Far North Queensland, Australia.

Study Design and Setting: Probabilistic data linkage was used to combine baseline health check data obtained in 1998/2000 and 2006/2007 for 64 residents in remote communities with their results on a single dementia assessment 10–20 years later (2015–2018). The relationship between earlier measures and later CIND/dementia status was examined using generalized linear modeling with risk ratios (RRs). Due to the small sample size, bootstrapping was used to inform variable selection during multivariable modeling.

Results: One third of participants (n = 21, 32.8%) were diagnosed with dementia (n = 6) or CIND (n = 15) at follow-up. Secondary school or further education (RR = 0.38, 95% CI 0.19–0.76, p = 0.006) and adequate levels of self-reported physical activity (RR = 0.26, 95% CI 0.13–0.52, p < 0.001) were repeatedly selected in bootstrapping and showed some evidence of protection against later CIND/dementia in final multivariate models, although these had moderate collinearity. Vascular risk measures showed inconclusive or unexpected associations with later CIND/dementia risk.

Conclusions: The preliminary findings from this small study highlighted two potential protective factors for dementia that may be present in this population. A tentative risk profile for later CIND/dementia risk is suggested, although the small sample size limits the applicability of these findings.

Item ID: 72542
Item Type: Article (Research - C1)
ISSN: 2296-2565
Keywords: dementia, First Nation, Indigenous, cognitive impairment, Australia, Aboriginal, Torres Strait Islander
Copyright Information: Copyright © 2022 Thompson, Russell, Harriss, Esterman, Taylor, Quigley, Strivens and McDermott. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Date Deposited: 13 May 2022 03:46
FoR Codes: 42 HEALTH SCIENCES > 4206 Public health > 420699 Public health not elsewhere classified @ 50%
45 INDIGENOUS STUDIES > 4504 Aboriginal and Torres Strait Islander health and wellbeing > 450499 Aboriginal and Torres Strait Islander health and wellbeing not elsewhere classified @ 50%
SEO Codes: 20 HEALTH > 2005 Specific population health (excl. Indigenous health) > 200502 Health related to ageing @ 50%
21 INDIGENOUS > 2103 Aboriginal and Torres Strait Islander health > 210399 Aboriginal and Torres Strait Islander health not elsewhere classified @ 50%
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