Residential proximity to major roads measured against incident dementia, Parkinson's disease, and multiple sclerosis in an Ontario population cohort
Chen H, Kwong JC, Copes R, et al. (2017) · The Lancet
The cohort study reported that living within 50 m of a major road was associated with a 7% higher incidence of dementia (hazard ratio 1.07) that decreased with distance, while no association was found for Parkinson's disease or multiple sclerosis.
What they studied
About 2.2 million adults aged 55–85 and 4.4 million aged 20–50, Ontario, Canada, 2001–2012
What they found
The cohort study reported that living within 50 m of a major road was associated with a 7% higher incidence of dementia (hazard ratio 1.07) that decreased with distance, while no association was found for Parkinson's disease or multiple sclerosis.
What it does not establish
This entry reports the study. It is not a statement about any building Sage Co. designs or constructs.
Source
- Chen H, Kwong JC, Copes R, et al. (2017). Residential proximity to major roads measured against incident dementia, Parkinson's disease, and multiple sclerosis in an Ontario population cohort · The Lancet · Read at the source
Last reviewed September 23, 2026.
Related reading
- Residential radon concentration measured against lung cancer risk in 13 European case-control studies
- Residential radon concentration measured against lung cancer risk in seven North American case-control studies
- Prenatal residential proximity to agricultural pesticide applications measured against autism spectrum disorder and developmental delay in a California case-control study
- Handbook published on indoor radon from a public health perspective
- Review of traffic-related air pollution emissions, exposure, and health effects reported in HEI Special Report 17
- Classification published for radon-222 and its decay products