concentrations and incidence of breast cancer in the NIH-AARP Diet and Health Study. Credit:Researchers at the National Institutes of Health found that living in an area with high levels of particulate air pollution was associated with an increased incidence of breast cancer. The study, published in, is one of the largest studies to date looking at the relationship between outdoor air pollution, specifically fine particulate matter, and breast cancer incidence.
The researchers saw that the largest increases in breast cancer incidence was among women who on average had higher particulate matter levels near their home prior to enrolling in the study, compared to those who lived in areas with lower levels of PMParticulate matter is a mixture of solid particles and liquid droplets found in the air. It comes from numerous sources, such as motor vehicle exhaust, combustion processes , wood smoke/vegetation burning, and industrial emissions.
"The ability to consider historic air pollution levels is an important strength of this research," said Rena Jones, Ph.D., senior author and principal investigator of the study at NCI."It can take many years for breast cancer to develop and, in the past, air pollution levels tended to be higher, which may make previous exposure levels particularly relevant for cancer development.
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