A study shows harm in short-term exposures and proposes a particulate threshold that could influence air quality alerts.
A newly identified threshold for exposure to particulate matter could help public health officials base air-quality warnings on the cardiovascular health risks associated with short-term exposure to poor-quality air.
In a systematic review and meta-analysis of 100 epidemiologic studies from 28 countries, Chinese investigators isolated an optimal alert value of 136 μg/m3—a global average—which they say could prevent 73.2% of cardiovascular deaths attributable to short-term exposure to air pollution. They say about 60,000 deaths in 2023 were related to CV events caused by short-term daily exposures to PM2.5 pollution at 75 μg/m3 greater.
Study investigator Tao Xue, PhD (Peking…