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PM2.5 particles
Sources£ºFunglan Date£º2014-2-11 Click£º1427

PM2.5 particles are air pollutants with a diameter of 2.5 micrometers or less, small enough to invade even the smallest airways. These particles generally come from activities that burn fossil fuels, such as traffic, smelting, and metal processing.

PM2.5 particles were measured in micrograms per cubic meter. For every 10 micrograms per cubic meter increase of PM2.5, CIMT increased by 5.9 percent. After adjusting for various factors, including smoking, the researchers found that CIMT increased by 3.9 to 4.3 percent for every 10 micrograms per cubic meter increase in PM2.5. There were greater increases in people over 60, women, and people taking cholesterol-lowering medication. The greatest increases were seen in women 60 or older: a 15.7 percent rise in CIMT for every 10 micrograms per cubic meter.

The changes observed were similar to those that occur in people living with smokers, Kuenzli said.