Effects of Particulate Air Pollution on Blood Pressure

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Effects of Particulate Air Pollution on Blood Pressure

Postby Wilberforce » Fri Dec 23, 2011 5:42 pm

Effects of Particulate Air Pollution on Blood Pressure in a Highly Exposed Population in Beijing, China:
A repeated-measure study

Andrea Baccarelli, Francesco Barretta, Chang Dou, Xiao Zhang, John P McCracken, Anaite Diaz, Pier ALBERTO Bertazzi, Joel Schwartz, Sheng Wang and Lifang Hou
http://www.ehjournal.net/content/10/1/108/abstract

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Environmental Health 2011, 10:108 doi:10.1186/1476-069X-10-108
Published: 21 December 2011
Abstract (provisional)
Background

Particulate Matter (PM) exposure is critical in Beijing due to high population density and rapid increase in vehicular traffic. PM effects on blood pressure (BP) have been investigated as a mechanism mediating cardiovascular risks, but results are still inconsistent. The purpose of our study is to determine the effects of ambient and personal PM exposure on BP.
Methods

Before the 2008 Olympic Games (June 15-July 27), we examined 60 truck drivers and 60 office workers on two days, 1-2 weeks apart (n=240). We obtained standardized measures of post-work BP. Exposure assessment included personal PM2.5 and Elemental Carbon (EC, a tracer of traffic particles) measured using portable monitors during work hours; and ambient PM10 averaged over 1-8 days pre-examination. We examined associations of exposures (exposure group, personal PM2.5/EC, ambient PM10) with BP controlling for multiple covariates.
Results

Mean personal PM2.5 was 94.6 ug/m3 (SD=64.9) in office workers and 126.8 (SD=68.8) in truck drivers (p-value<0.001). In all participants combined, a 10 mug/m3 increase in 8-day ambient PM10 was associated with BP increments of 0.98 (95%CI 0.34; 1.61; p-value=0.003), 0.71 (95%CI 0.18; 1.24; p-value=0.01), and 0.81 (95%CI 0.31; 1.30; p-value=0.002) mmHg for systolic, diastolic, and mean BP, respectively. BP was not significantly different between the two groups (p-value>0.14). Personal PM2.5 and EC during work hours were not associated with increased BP.
Conclusions

Our results indicate delayed effects of ambient PM10 on BP. Lack of associations with exposure groups and personal PM2.5/EC indicates that PM effects are related to background levels of pollution in Beijing, and not specifically to work-related exposure.


The complete article is available as a provisional PDF. The fully formatted PDF and HTML versions are in production.
http://www.ehjournal.net/content/pdf/14 ... 10-108.pdf
• The Surgeon General has determined that there is no safe level of exposure to ambient smoke!

• If you smell even a subtle odor of smoke, you are being exposed to poisonous and carcinogenic chemical compounds!

• Even a brief exposure to smoke raises blood pressure, (no matter what your state of health) and can cause blood clotting, stroke, or heart attack in vulnerable people. Even children experience elevated blood pressure when exposed to smoke!

• Since smoke drastically weakens the lungs' immune system, avoiding smoke is one of the best ways to prevent colds, flu, bronchitis, or risk of an even more serious respiratory illness, such as pneumonia or tuberculosis!
Does your child have the flu? Chances are they have been exposed to ambient smoke!
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