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Air pollution level changes in Beijing linked with biomarkers of cardiovascular disease
Date:5/15/2012

2P] and soluble CD40 ligand [sCD40L] as well as the adhesive endothelial glycoprotein von Willebrand factor).

Concentrations of particulate and gaseous pollutants decreased substantially (-13 percent to -60 percent) from the pre-Olympic period to the during-Olympic period. There were reductions in the average concentration of sulfur dioxide (-60 percent), carbon monoxide (-48 percent), nitrogen dioxide (-43 percent), elemental carbon (-36 percent), PM2.5 (-27 percent), organic carbon (-22 percent), and sulfate (-13 percent) from the pre-Olympic to the during-Olympic period. "In contrast, ozone concentrations increased (24 percent). Pollutant concentrations generally increased substantially from the during- to post-Olympic period for all the pollutants (21 percent to 197 percent) except ozone (-61 percent) and sulfate (-47 percent)," the authors write.

The researchers observed statistically significant improvements in SCD62P levels (by -34.0 percent), and von Willebrand factor (by -13.1 percent). Changes in the other outcomes were not statistically significant after adjustments for multiple comparisons. In the post-Olympic period when pollutant concentrations increased, most outcomes approximated pre-Olympic levels, but only sCD62P and systolic blood pressure were significantly worsened from the during-Olympic period. "The fraction of above-detection-limit values for CRP was reduced from 55 percent in the pre-Olympic period to 46 percent in the during-Olympic period and reduced further to 36 percent in the post-Olympic period. Interquartile range increases in pollutant concentrations were consistently associated with statistically significant increases in fibrinogen, von Willebrand factor, heart rate, sCD62P, and SCD40L concentrations."

"Although these findings are of uncertain clinical significance, this study provides quasi-experimental, mechanistic data to support the argument that air pollution may be a global risk factor for CVD." '/>"/>

Contact: Alison Trinidad
alison.trinidad@usc.edu
323-442-3941
JAMA and Archives Journals
Source:Eurekalert

Page: 1 2 3 4

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