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Particle radiation exposure from radon gas associated with CVD mortality

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October 5, 2022

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Chronic, long-term exposure to radioactive particulate matter common to radon gas Researchers report that it may increase CVD mortality, especially from myocardial infarction and stroke.

The primary source of particle radioactivity in the United States is radon gas from its decay products. Shuxin Dong, SM, PhD student and colleague in Population Health Sciences at Harvard TH Chan School of Public Health writes: They write that once radon, a colorless and odorless noble gas, is formed, it moves into the atmosphere.

“We know that particulate matter (afternoon2.5) are very small particles in the air that can cause many health problems when inhaled. However, little is known about what physical, chemical, or biological properties of PM contribute to its toxicity,” Dong said in a press release. “We studied total beta radioactivity, which is a property of one particulate matter that is the result of radon attaching to particles, making them radioactive, resulting in particle radioactivity. The tiny particles of it penetrate deep into the lungs, enter the bloodstream, and circulate throughout the body.”

Don and colleagues analyzed mortality data from the Massachusetts Department of Health from 2001 to 2015. Data included address, date of death, location of death, and underlying cause coordinates. The researchers then transformed the coordinates of the place of residence into the corresponding zip code aggregation area and tabulated the number of deaths for each cause by year and by zip code aggregation area. Researchers analyzed the association between particle radioactivity, measured as total beta activity from highly resolved spatiotemporal projections, and mortality from CVD, MI, stroke, and non-accidental death from all causes. did. Analyzes were also stratified by age group.

The survey results are Journal of the American Heart Association.

Researchers observed an association between total beta activity and PM2.5 and their cause of death.Using Difference Differences and Adjusting PM2.5researchers found the highest association with MI (incidence ratio [IRR] = 1.16; 95% CI, 1.08-1.24) and stroke (IRR = 1.11; 95% CI, 1.04-1.18) had an interquartile range increase in total beta activity (0.055 millibecquerels per cubic meter).

Researchers have also observed positive interactions between PMs.2.5 and total beta activity, PM2.5 Mortality at higher levels of total beta activity. Associations varied by age group.

“The risk of all-cause mortality from cardiovascular disease, heart attack, stroke, and PM is high, and therefore higher levels of total beta activity are associated with higher toxicity,” Dong said in a release. suggested that particulate radioactivity increases the risk of death from cardiovascular disease and enhances damage from particulate matter, which needs further investigation. Targeted and cost-effective air quality regulation

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