Background

In the UK the incidence of dementia among the elderly is 31.1 per 1,000 person-years in 2018, with the rate varying according to ethnic group. Specifically, the age and sex adjusted incidence of dementia in the UK has been shown to be 22% higher in black people compared to white people, but 16% lower in South Asian people than white people. Recent studies have identified 12 modifiable risk factors for dementia which include: early life education, hearing loss, traumatic brain injury, hypertension, alcohol intake, obesity, smoking, depression, social isolation, physical inactivity, diabetes and air pollution. The risk factors may account for 40% of global dementia cases. The prevalence of some of these risk factors vary according to ethnic group, for example diabetes is around three times more prevalent in South Asian and Black people than in white people. The impact of some of these risk factors on the risk of dementia has also been shown to vary according to ethnic group.

Aim

This study aims to report the prevalence of the 12 dementia risk factors according to ethnic group, and to examine whether these risk factors have larger or smaller impact on the risk of dementia in different ethnic groups.

Methods

This study will use data from Connected Bradford which links routine electronic data across primary care, secondary care, community care and social care for over 800,000 citizens in the Bradford district, UK. Our participants include patients aged over 45 with and without a diagnosis of dementia between 2009 to 2019. We will report the prevalence of the 12 dementia risk factors across ethnic groups (White, Black, South Asian, Mixed, Others). Multiple regression models will be used to examine the association of the predictor variables with dementia using R software.

This study will provide a better understanding of existing inequalities in dementia risk among ethnic minorities.

The findings will inform policies aiming to reduce the rising burden of dementia in a diverse population.

Our findings will shape future dementia prevention to provide tailored services, taking into account ethnicity and risk-factor profile to promote brain health equity.

Timescales

01/05/2023 – 30/04/2025

Funding agency

National Institute for Health and Care Research (NIHR) – Yorkshire and Humber Applied Research  Collaboration

Further information

For further information contact:

Dr Lin Gong  telephone: 01274 383406.

This independent research funded by the National Institute for Health and Care Research (NIHR), Yorkshire and Humber Applied Research Collaborations NIHR200166. The views expressed in this publication are those of the author(s) and not necessarily those of the NHS, the National Institute for Health and Care Research or the Department of Health and Social Care.