Overview
- The Nature Human Behaviour study pooled 202 articles to assess 26 peripheral diseases and identified 16 linked to higher dementia risk.
- Using prevalence figures from UK Biobank and the Global Burden of Disease study (1990–2021), the authors estimate roughly 18.8–19 million dementia cases worldwide are associated with these conditions.
- The list spans periodontal disease, chronic liver disease, hearing or vision loss, type 2 diabetes, chronic kidney disease, osteoarthritis, stroke, ischaemic heart disease, COPD, asthma, atrial fibrillation, atopic dermatitis, rheumatoid arthritis, multiple sclerosis, and inflammatory bowel disease.
- Researchers emphasize the findings show associations rather than causation and call for intervention studies to test whether treating these conditions reduces dementia incidence.
- Recommended actions include oral-health programs with regular dental care for high-risk groups, broader hepatitis B vaccination, clearer alcohol-harm messaging, and stronger management of diabetes and cardiovascular disease.