Scientists Discover a Sign of Dementia up to 15 Years Before Diagnosis

Key Points:

• A Finnish study of nearly 800 patients found that individuals diagnosed with early-onset dementia experienced significant declines in work productivity up to 15 years before their diagnosis, resulting in average income losses of about €74,577 ($86,000) per person.
• The timing of productivity decline varied by dementia type: losses began approximately six years before diagnosis for Alzheimer's disease, 11 years prior for frontotemporal dementia, and around diagnosis time for alpha-synucleinopathies.
• Researchers used national tax and health records to compare incomes of dementia patients with matched controls, accounting for education and other health conditions to isolate dementia's impact on productivity.
• The study highlights the socioeconomic burden of early-onset dementia and suggests that earlier recognition of cognitive decline in the workplace could prompt timely medical evaluation and support.
• Limitations include the retrospective design, which cannot prove causation; future research is needed to track cognitive changes prospectively and develop interventions to delay productivity loss.