Scientists have discovered that some adults who are later diagnosed with early-onset dementia may begin experiencing problems at work many years before anyone knows they have the disease.
The research, published in Neurology, suggests that changes in earnings and work performance could appear long before a formal diagnosis is made. The study was led by researchers from the University of Eastern Finland.
Early-onset dementia affects people younger than 65 years of age. Unlike dementia in older adults, this form often strikes during the busiest years of life when people are building careers, supporting children, and planning for retirement. Losing the ability to work during these years can place enormous stress on individuals and their families.
Dementia slowly damages brain cells. Although memory loss is well known, early symptoms are often much broader. People may have trouble organizing work, making decisions, solving problems, understanding conversations, or controlling emotions. These changes can reduce confidence and make even familiar jobs more difficult.
To investigate whether these changes affect working life before diagnosis, researchers examined information from 793 adults with early-onset dementia and compared them with nearly 8,000 people of similar age and sex who did not have dementia.
Finland’s national health and tax databases allowed the team to compare education, medical conditions, and yearly income over many years.
The researchers found that income differences gradually increased as diagnosis approached. Overall, people with early-onset dementia experienced an average productivity loss of about 74,577 euros over the study period. That equals roughly 12,000 euros per year. These differences appeared many years before doctors officially diagnosed the disease.
The timing depended on the type of dementia. Alzheimer’s disease showed measurable productivity losses about six years before diagnosis.
Frontotemporal dementia showed changes about 11 years before diagnosis. Alpha-synuclein disorders showed much later changes, while several other dementia types showed persistently high productivity losses throughout the observation period.
The findings suggest that early brain changes may quietly interfere with work long before serious memory problems become obvious. Some people may change jobs, reduce working hours, or leave employment without realizing an underlying brain disorder is developing.
Researchers believe delayed diagnosis may be one reason these losses continue for so long. Earlier recognition could allow families to plan financially, employers to provide support, and healthcare professionals to begin treatment and counselling sooner. Although current treatments cannot cure dementia, early care may improve quality of life.
The authors emphasized that this research found an association rather than proof of cause and effect. Because it used existing records, it cannot show that dementia alone caused lower productivity. Other personal, social, or medical factors may also influence income. Future studies that regularly test thinking and memory over many years may provide clearer answers.
This study offers valuable insight into the hidden effects of dementia before diagnosis. Its large sample size and long follow-up strengthen the findings, but results from one country may not apply equally everywhere.
Even so, the message is important. Unexplained long-term changes in work performance should not always be dismissed as stress or aging. In some cases, they may signal an underlying medical condition that deserves careful assessment. Earlier diagnosis and better workplace awareness could reduce both personal and financial hardship for many families.
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Source: University of Eastern Finland.
