Association of short-term exposure to fine particulate matter and nitrogen dioxide with acute cardiovascular effects

• DOI: 10.1016/j.scitotenv.2016.06.084
• Publication Date: 2016-06-24T06:31:10Z
• Authors: Chang-Fu Wu; Fu-Hui Shen; Ya-Ru Li; Tsung-Ming Tsao; Ming-Jer Tsai; Chu-Chih Chen; Jing-Shiang Hwang; Sandy Huey-Jen Hsu; Hsing Chao; Kai-Jen Chuang; Charles C.K. Chou; Ya-Nan Wang; Chi-Chang Ho; Ta-Chen Su
• Keywords: Adult; Male; Urban Population; Nitrogen Dioxide; Taiwan; Pulse Wave Analysis; 01 natural sciences; Vascular Stiffness; 11. Sustainability; Humans; Ankle Brachial Index; 0105 earth and related environmental sciences; Inflammation; Air Pollutants; Environmental Exposure; Middle Aged; 3. Good health; C-Reactive Protein; 13. Climate action; Linear Models; Regression Analysis; Female; Particulate Matter; Environmental Monitoring

This study evaluated whether exposure to fine particulate matter (PM2.5) and nitrogen dioxide (NO2) is associated with cardiovascular effects by examining a panel of 89 healthy subjects in Taipei, Taiwan. The subjects received two health examinations approximately 8months apart in 2013. Brachial-ankle pulse wave velocity (baPWV), a physiological indicator of arterial stiffness, and high-sensitivity C-reactive protein (hsCRP), a biomarker of vascular inflammations, were measured during each examination. Two exposure assessment methods were used for estimating the subjects' exposure to PM2.5 and NO2. The first method involved constructing daily land use regression (LUR) models according to measurements collected at ambient air quality monitoring stations. The second method required combining the LUR estimates with indoor monitoring data at the workplace of the subjects. Linear mixed models were used to examine the association between the exposure estimates and health outcomes. The results showed that a 10-μg/m(3) increase in PM2.5 concentration at a 1-day lag was associated with 2.1% (95% confidence interval: 0.7%-3.6%) and 2.4% (0.8%-4.0%) increases in baPWV based on the two exposure assessment methods, whereas no significant association was observed for NO2. The significant effects of PM2.5 remained in the two-pollutant models. By contrast, NO2, but not PM2.5, was significantly associated with increased hsCRP levels (16.0%-37.3% in single-pollutant models and 26.4%-44.6% in two-pollutant models, per 10-ppb increase in NO2). In conclusion, arterial stiffness might be more sensitive to short-term PM2.5 exposure than is inflammation.