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Research we’re looking at
Could living near a busy road or near train tracks put you at a higher risk of dementia? A study published on September 11, 2021 in BMJ found that people living near noisy transportation routes for many years appeared to have a higher risk of dementia, especially Alzheimer’s disease, compared to those who lived in quieter places.
The authors of the study in Denmark looked at national health registers, which included 105,500 cases of dementia in adults over 60 from 2004 to 2017. They then looked at estimates of rail traffic and noise. residential areas across the country. After controlling for other factors, such as socioeconomic status and air pollution, they found that people living in areas with heavy traffic or railway noise for a decade or more had a higher risk of dementia in general and a 27% increased risk of Alzheimer’s disease. . Road noise, but not train noise, was also linked to a higher risk of vascular dementia, a type of dementia caused by reduced blood flow to the brain due to plaque buildup in the arteries. Researchers hypothesized that noise can affect sleep quality or cause increased stress that affects brain health. They say the results show the importance of public programs in reducing noise pollution.
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