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Cycling, Air Pollution and Health (CAPaH)

15. oktober 2012 oppdatert av: 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

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Faktiske)

38

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

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

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

19 år til 39 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

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

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Forebygging
  • Tildeling: Randomisert
  • Intervensjonsmodell: Crossover-oppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Normal cycling
Cycling on a residential and downtown route (crossover design)
Atferdsmessig: Cycling on a residential route

Hva måler studien?

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

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

University of British Columbia

Etterforskere

  • Hovedetterforsker: Michael Brauer, ScD, The University of British Columbia

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Generelle publikasjoner

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. juni 2010

Primær fullføring (Faktiske)

1. november 2011

Studiet fullført (Faktiske)

1. november 2011

Datoer for studieregistrering

Først innsendt

9. oktober 2012

Først innsendt som oppfylte QC-kriteriene

15. oktober 2012

Først lagt ut (Anslag)

16. oktober 2012

Oppdateringer av studieposter

Sist oppdatering lagt ut (Anslag)

16. oktober 2012

Siste oppdatering sendt inn som oppfylte QC-kriteriene

15. oktober 2012

Sist bekreftet

1. oktober 2012

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Andre studie-ID-numre

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

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

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