Sunday, February 20, 2011

Health Impacts from Residential Traffic Exposure

Residential Traffic Exposure, Pulse Pressure and C-reactive Protein: Consistency and Contrast Among Exposure Characterization Methods (45 page pdf, Environ Health Perspect, 02 February 2010)
Key Quotes:
Traffic exposure has been shown to increase cardiovascular disease (CVD) risk via systemic inflammation and elevated blood pressure
association between traffic exposure indicators as predictors of C-reactive protein (CRP) and pulse pressure in an adult U.S. Puerto Rican population
Pulse pressure was positively associated with residence 100 m of a roadway with a difference of 2.2mmHg (95% CI, 0.13 – 4.3 mmHg) for the total population and 3.8 (95% CI, 0.88 – 6.8) for those with BMI 30.
Differential personal exposure to particles, gaseous pollutants and traffic pollution have been associated with lower socioeconomic position with respect to education, minority status and income and major roadways have been routed through lower-income areas with less political and economic power
Traffic density has been identified as a significant predictor of NOx, NO2, PM2.5, the soot content of PM2.5 and volatile organic chemicals
Roadway proximity 100 m was significant for pulse pressure, whereas proximity 200 m was significant for CRP.
This study found adverse health effects were associated with residence near roadways with traffic volumes between 20,000 – 40,000 vehicles per day, suggesting risks from residential exposure at lesser roadway volumes than previously reported.

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