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Cycling, Air Pollution and Health (CAPaH)

15. oktober 2012 opdateret af: 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

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

38

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

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

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

19 år til 39 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

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

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Normal cycling
Cycling on a residential and downtown route (crossover design)
Adfærdsmæssigt: Cycling on a residential route

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
Change in endothelial function, as measured by peripheral arterial tonometry (EndoPAT) score of reactive hyperemia index (RHI)
Tidsramme: 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

Sekundære resultatmål

Resultatmål
Tidsramme
Change in lung function (using spirometry to assess lung function values)
Tidsramme: 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

Andre resultatmål

Resultatmål
Tidsramme
Change in blood levels of C-reactive protein (a marker of systemic inflammation)
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of British Columbia

Efterforskere

  • Ledende efterforsker: Michael Brauer, ScD, The University of British Columbia

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. juni 2010

Primær færdiggørelse (Faktiske)

1. november 2011

Studieafslutning (Faktiske)

1. november 2011

Datoer for studieregistrering

Først indsendt

9. oktober 2012

Først indsendt, der opfyldte QC-kriterier

15. oktober 2012

Først opslået (Skøn)

16. oktober 2012

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

16. oktober 2012

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. oktober 2012

Sidst verificeret

1. oktober 2012

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

  • H10-00902
  • H1008-111481/001/XSB (Anden identifikator: UBC CREB)

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Endotel dysfunktion

Kliniske forsøg med Cycling on a residential route

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