New cases of dementia are rising in elderly populations in Wales, UK.

"Declaration of Competing Interest None."

"Funding sources Funding: This work was supported by the Dementia Research Institute [UKDRI supported by the 10.13039/501100000265Medical Research Council (UKDRI-3003), 10.13039/501100002283Alzheimer's Research UK, and Alzheimer's Society], Joint Programming for Neurodegeneration (MRC: MR/T04604X/1), Dementia Platforms UK (MRC: MR/L023784/2), MRC Centre for Neuropsychiatric Genetics and Genomics (MR/L010305/1), Dolby Foundation. CS is supported by the Ser Cymru II programme which is part-funded by 10.13039/501100000866Cardiff University and the 10.13039/501100008530European Regional Development Fund through the Welsh Government. AS is supported by a PhD studentship funded by Health and Cares Research Wales."