Dementia Linked to Wider Range of Health Conditions Than Previously Thought
Dementia isn’t always solely a brain disease, according to a new study published on January 20 in the journal Nature Human Behaviour. Researchers now suggest that approximately one-third of dementia cases may be connected to illnesses that don’t directly affect the brain.
The research, which analyzed data from over 200 prior studies, examined the association between dementia and 26 conditions affecting other systems within the body. This finding highlights the importance of considering overall health when assessing dementia risk and developing preventative strategies.
Dementia is characterized by memory loss, difficulties with reasoning, communication problems, and other cognitive impairments, with Alzheimer’s disease, stroke, infections, and traumatic injuries being common causes. While research has traditionally focused on the brain, this study expands that perspective to include the impact of general health.
The analysis identified a link between 16 peripheral diseases and an increased risk of dementia. These include periodontal disease, chronic liver disease, hearing and vision loss, type 2 diabetes, chronic kidney disease, osteoarthritis, heart disease, chronic obstructive pulmonary disease, asthma, multiple sclerosis, and inflammatory bowel disease.
Collectively, these conditions account for roughly 33% of the global dementia burden, equating to approximately 18.8 million cases. Understanding these connections could lead to new approaches to dementia prevention and management.
The MSD Manual explains that dementia is a progressive decline in mental function affecting memory, thinking, judgment, and learning ability. While depression can sometimes mimic dementia, particularly in older adults, the two conditions are generally distinguishable.
Currently, treatments for dementia primarily focus on managing symptoms to slow progression and improve quality of life. However, ongoing research, as noted by PUC-Rio, is exploring ways to reduce cognitive decline by targeting the buildup of amyloid protein in the brain and boosting the production of acetylcholine, a neurotransmitter crucial for memory.
According to the World Health Organization, approximately 35 million people worldwide currently have Alzheimer’s disease, with an estimated 100,000 new cases diagnosed annually in Brazil. These numbers are expected to rise with increasing life expectancy.
