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首页> 外文期刊>The Science of the Total Environment >Exposures to PM_(2.5) components and heart rate variability in taxi drivers around the Beijing 2008 Olympic Games
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Exposures to PM_(2.5) components and heart rate variability in taxi drivers around the Beijing 2008 Olympic Games

机译：北京2008年奥运会前后出租车司机的PM_（2.5）成分暴露量和心率变异性

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摘要

Background: Carbonaceous and metallic components of particles have been shown to play a role in particles' effects on cardiac autonomic function as measured by heart rate variability (HRV). Previously we reported the association of HRV with marked changes in traffic-related paniculate air pollution around the Beijing 2008 Olympic Games in a panel of taxi drivers. Objective: We further investigated the relationship between exposures to the carbonaceous and metallic components of traffic-related particles and HRV in the same population. Methods: Repeated measurements of in-car exposures to particulate matter ≤2.5μm in aerodynamic diameter (PM_(2.5)), carbon monoxide and nitrogen oxides were conducted in a group of 14 taxi drivers for one work shift in four study periods around the Beijing 2008 Olympics. The quantities of organic/elemental carbons and 27 elements of the in-car PM_(2.5) mass were determined laboratorially. Linear mixed-effects models were used to evaluate the impact of exposures to different PM_(2.5) components on HRV while controlling for potential confounders. Results: Taxi drivers' exposures to in-car PM_(2.5) and its components showed dramatic changes across the four study periods around the Beijing 2008 Olympics. Differences in associations of in-car PM_(2.5) components with HRV were found. An interquartile range (IQR: 917.9 ng/m~3) increase in calcium was associated with a 5.48 millisecond [ms, 95% confidence interval (CI): 0.71, 10.24] increase in standard deviations of normal-to-normal (SDNN) intervals, while an IQR (4.1 ng/m3) increase in nickel was associated with a 1.53 ms (95% CI: 0.14, 2.92) increase in SDNN index. Additionally, a decline of 8.11 ms (95% CI: -15.26, -0.97) in SDNN per IQR (481.4 ng/m~3) increase in iron was also found. Conclusion: The results support associations of PM_(2.5) metallic components with HRV in younger healthy individuals. Future studies are needed to clarify the interaction among different PM_(2.5) components or the role of PM_(2.5) mixtures.
机译：背景：通过心率变异性（HRV）测量，已显示颗粒的碳和金属成分在颗粒对心脏自主神经功能的影响中起作用。之前，我们在一组出租车司机中报告了HRV与北京2008年奥运会前后交通相关的微粒空气污染显着变化的关联。目的：我们进一步调查了同一人群中交通相关颗粒的碳和金属成分暴露与HRV之间的关系。方法：在北京周围四个研究阶段，对一组14名出租车驾驶员进行了重复测量，以测量车内空气动力学直径≤2.5μm的颗粒物（PM_（2.5），一氧化碳和氮氧化物）的暴露情况。 2008年奥运会。实验室确定了车内PM_（2.5）质量的有机/元素碳和27种元素的数量。线性混合效应模型用于评估暴露于不同PM_（2.5）组分对HRV的影响，同时控制潜在的混杂因素。结果：出租车司机在车内PM_（2.5）及其成分中所占的比例在北京2008年奥运会前后的四个研究期内均发生了巨大变化。发现车载PM_（2.5）组分与HRV的关联存在差异。钙的四分位数范围（IQR：917.9 ng / m〜3）增加与标准间（SDNN）标准偏差的5.48毫秒[ms，95％置信区间（CI）：0.71、10.24]相关间隔时间，而镍的IQR（4.1 ng / m3）增加与SDNN指数增加1.53 ms（95％CI：0.14，2.92）有关。此外，还发现每增加IQR（481.4 ng / m〜3）铁，SDNN下降8.11 ms（95％CI：-15.26，-0.97）。结论：结果支持年轻健康个体中PM_（2.5）金属成分与HRV的相关性。需要进一步研究来阐明不同PM_（2.5）组分之间的相互作用或PM_（2.5）混合物的作用。

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  • 来源
    《The Science of the Total Environment》 |2011年第13期|p.2478-2485|共8页
  • 作者

    Shaowei Wu; Furong Deng; Jie Niu; Qinsheng Huang; Youcheng Liu; Xinbiao Guo;

  • 作者单位

    Department of Occupational and Environmental Health Sciences, Peking University School of Public Health, Beijing, China;

    Department of Occupational and Environmental Health Sciences, Peking University School of Public Health, Beijing, China;

    Peking University Third Hospital, Beijing, China;

    Peking University Third Hospital, Beijing, China;

    Department of Environmental and Occupational Health Sciences, School of Public Health, University of North Texas Health Science Center, Fort Worth, TX, USA;

    Department of Occupational and Environmental Health Sciences, Peking University School of Public Health, Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    air pollution; cardiac autonomic function; epidemiology; heart rate variability; particulate matter; traffic;

    机译：空气污染;心脏自主神经功能;流行病学心率变异性颗粒物交通;

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