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Cycling, Air Pollution and Health (CAPaH)

2012年10月15日 更新者:University of British Columbia

Introduction: Cycling is currently promoted at the municipal, provincial and national level as a form of active transportation that increases physical activity while at the same time reducing traffic congestion, traffic-related air pollution and greenhouse gas emissions. While at a population level the health benefits of exercise via cycling are estimated to substantially exceed any health impacts related to air pollution exposure and injuries from traffic accidents , cyclists are known to experience elevated exposures to traffic-related air pollutants. Combined with exposure to elevated concentrations of air pollutants, cyclists also are subject to substantially increased inhaled doses due to their level of exertion and consequently increased inhalation rate. Therefore, given that cyclists experience exposures to relatively high concentrations of traffic-related air pollutants and that their inhalation of these pollutants is increased, it is important to evaluate the potential health impacts of this scenario. Research on the potential health impacts related to exercise (cycling) and urban air pollution exposure can help inform public communication strategies related to air quality and its health impacts. In addition, as our previous work suggests substantial variability in air pollution exposures to cyclists that is related to the route type and the levels of traffic along cycling routes, there is potential for transportation planners to promote increased cycling by enhancing infrastructure while at the same time developing routes that also minimize exposure to air pollution. The cyclist population is also interested in information regarding the air pollution exposures and potential health impacts related to cycling.

The objective of this study is to investigate the relationship between traffic-related air pollution exposure, and respiratory and cardiovascular health impacts in commuting cyclists. Specifically, the investigators propose to:

  1. determine commuting cyclists' exposure to traffic-related air pollutants (PM 2.5, PM10, ultrafine particulate, black carbon) while cycling along two different bicycle routes in the city of Vancouver;
  2. estimate the pollutant dose received by each cyclist, and relate this to the health effects observed; and
  3. determine if there is a change in lung function, endothelial function, and C-reactive protein level related to the level of air pollution exposure and dose

研究概览

地位

完全的

条件

干预/治疗

研究类型

介入性

注册 (实际的)

38

阶段

  • 不适用

联系人和位置

本节提供了进行研究的人员的详细联系信息,以及有关进行该研究的地点的信息。

学习地点

    • British Columbia
      • Vancouver、British Columbia、加拿大、V6T 1Z3
        • Air Pollution Exposure Lab, Vancouver General Hospital through the School of Population and Public Health, University of British Columbia

参与标准

研究人员寻找符合特定描述的人,称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

19年 至 39年 (成人)

接受健康志愿者

是的

有资格学习的性别

全部

描述

Inclusion Criteria:

  • Age 19- 39
  • male or female
  • able to bicycle comfortably on city streets for 1 hour

Exclusion Criteria:

  • Smokers of any substance (smoking more than 1x every 2 weeks)
  • Must be of height to safely ride a test bike (<5'2", >6'5" )
  • Diagnosed asthma or active allergy (hav fever) symptoms
  • Irregular menstrual cycle, pregnant, breastfeeding, non-monocyclic contraceptive medication or device
  • Taking medication for heart or lung condition
  • Answers yes to any questions on physical activity readiness questionnaire (PAR-Q)
  • requires pain medication daily
  • visual or hearing impairment that prevents safe cycling on streets with motor vehicles

学习计划

本节提供研究计划的详细信息,包括研究的设计方式和研究的衡量标准。

研究是如何设计的?

设计细节

  • 主要用途:预防
  • 分配:随机化
  • 介入模型:交叉作业
  • 屏蔽:无(打开标签)

武器和干预

参与者组/臂
干预/治疗
实验性的:Normal cycling
Cycling on a residential and downtown route (crossover design)

研究衡量的是什么?

主要结果指标

结果测量
大体时间
Change in endothelial function, as measured by peripheral arterial tonometry (EndoPAT) score of reactive hyperemia index (RHI)
大体时间:Baseline (1 hour pre-expousre) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
Baseline (1 hour pre-expousre) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors

次要结果测量

结果测量
大体时间
Change in lung function (using spirometry to assess lung function values)
大体时间:Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors

其他结果措施

结果测量
大体时间
Change in blood levels of C-reactive protein (a marker of systemic inflammation)
大体时间:Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
Change in blood levels of Interleukin-6 (a marker of systemic inflammation)
大体时间:Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
Change in blood levels of 8-hydroxy-2'-deoxyguanosine (8-OHdG)(a marker of oxidative stress)
大体时间:Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

调查人员

  • 首席研究员:Michael Brauer, ScD、The University of British Columbia

出版物和有用的链接

负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查,以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始

2010年6月1日

初级完成 (实际的)

2011年11月1日

研究完成 (实际的)

2011年11月1日

研究注册日期

首次提交

2012年10月9日

首先提交符合 QC 标准的

2012年10月15日

首次发布 (估计)

2012年10月16日

研究记录更新

最后更新发布 (估计)

2012年10月16日

上次提交的符合 QC 标准的更新

2012年10月15日

最后验证

2012年10月1日

更多信息

与本研究相关的术语

其他研究编号

  • H10-00902
  • H1008-111481/001/XSB (其他标识符:UBC CREB)

此信息直接从 clinicaltrials.gov 网站检索,没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求,请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改,我们的网站上也会自动更新.