As life expectancy and inward migration of older people impacts on the percentage of older people in the region, the number of People Living with Dementia (PLwD) in West Wales is expected to increase significantly in the coming decades with subsequent impacts on care and support services as well as unpaid carers. However, whilst age is a significant risk factor in developing dementia, dementia is not an inevitable part of ageing.
Key messages are as follows:
- Estimated number of people living with dementia in West Wales is 6,161
- Total number of people living with a diagnosis of dementia in West Wales in 2025 is 3,210
- In 2024 the dementia diagnosis rate in West Wales was 52.1%
- Estimated that 2,951 in West Wales are undiagnosed with dementia
- There is a projected regional increase of 41% to 2030 (severe dementia) in West Wales, with variation as follows (West Wales MSR 2020): Carmarthenshire=41%, Ceredigion=37%, Pembrokeshire=44%
- Over thirty genetic, medical, lifestyle, cultural and societal factors have been identified, which impact the risk of cognitive decline differently depending on gender. Some of these factors increase risk more dramatically in women than in men.
- Older adults in the West Wales region have increasingly complex needs.
Prevention and Intervention
In 2020 research indicated that 12 modifiable risk factors account for around 40% of worldwide dementias, which consequently could theoretically be prevented or delayed (Dementia prevention, intervention, and care: 2020 report of the Lancet Commission)
Modifiable risk factors are those that we, as individuals, or that policymakers can influence.

Following latest analysis, the list of confirmed dementia risk factors has been increased to 14. Two more than previously recognised and these relate to uncorrected vision loss and high cholesterol.
The researchers calculate that if, as a society and as individuals, we could completely address these 14 health and lifestyle factors it could prevent or delay nearly half (45%) of dementia cases.
Genetic risk factors aren’t listed and whilst is significant in atypical presentations, there is a need to consider whether this is a modifiable risk factor in it’s own right.
Other ‘prevention and intervention’ that is not considered by Lancet is diet - it talks of obesity, but does not mention the benefits of diet more broadly?
Menopause/change in estragon levels is a risk factor - Influence of the Onset of Menopause on the Risk of Developing Alzheimer’s Disease - PMC – important to understand given it’s the leading cause of death in women and more women live with dementia than men.
There is also evidence that bilingualism is a buffer for developing Dementia – which is relevant within our population and an issue given that we don’t have a measure to assess Welsh-English speakers.