- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT01570062
Cardiovascular Effects of Aerosols in Residences Study (CLEAR)
Subclinical Cardiovascular Health Benefits of Interventions to Reduce Exposure to Combustion-Derived Particulate Air Pollution
This study is focused on the effects of HEPA filtration to reduce exposures to combustion-derived air pollution (CDAP). Specifically, the study will evaluate the health benefits of HEPA filters and compare the cardiovascular toxicity of two major sources of CDAP, specifically traffic and residential wood combustion.
Specifically, the purpose of this study is to evaluate the ability of portable high efficiency particle air (HEPA) filters to reduce exposures to PM2.5 and air pollution indoors and to improve subclinical indicators of microvascular function and systemic inflammation among healthy adult participants.
The investigators hypothesize that HEPA filter use will help decrease indoor concentrations of CDAP thereby helping to mitigate the associated cardiovascular risks.
Panoramica dello studio
Stato
Condizioni
Intervento / Trattamento
Descrizione dettagliata
To address knowledge gaps about health risks of specific pollution sources and to provide new evidence on the health benefits of air pollution interventions, the objectives of this study are: 1) quantify the relationship between low-level exposures to combustion-derived PM air pollution and subclinical indicators of cardiovascular disease risk; and 2) compare the relative impact of HEPA filtration for two major PM sources (traffic and residential wood combustion) on these indicators.
The use of HEPA filters may help to mitigate cardiovascular risks factors caused by combustion-derived air pollution (CDAP), (specifically woodstove and traffic emissions). We hypothesize that HEPA filter use and improved woodstove technology will help decrease indoor occurrences of CDAP. This project will help address knowledge gaps in CDAP-related health risks and benefits of interventions. Specific objectives include establishing a relationship between exposure to CDAP and biomarkers of cardiovascular risk and evaluating the impact of HEPA filter use towards improved indoor air quality and health indicators.
Tipo di studio
Iscrizione (Effettivo)
Fase
- Fase 2
Contatti e Sedi
Luoghi di studio
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British Columbia
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Burnaby, British Columbia, Canada, V5A 1S6
- Simon Fraser University
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- 19 years or older
- non-smoking household
- lives within study boundaries and in areas of interest
Exclusion Criteria:
- COPD
- asthma
- diabetes
- heart disease
- hypertension
- arthritis
- gum disease
- occupationally exposed to traffic exposures &/or woodsmoke
- if female, pregnant
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Prevenzione
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione incrociata
- Mascheramento: Separare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
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Comparatore attivo: Indoor Air HEPA Filtration
HEPA filters will be placed in participant's main living area and bedroom.
Actual filtration will occur during only one of the two 7-day sampling periods.
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Two HEPA filters will be placed in participant's homes (one in the bedroom and one in the main living area); each HEPA will run for 2 consecutive 7-day sampling sessions.
During one of the 7-day sampling sessions, the HEPA filter will run without the internal filter in place (i.e., "placebo" filtration).
Altri nomi:
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Comparatore placebo: HEPA Filtration Placebo
For one of two 7-day sampling sessions, HEPA filters placed in participants' homes will be run without an actual filter in the housing unit.
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for one of the two 7-day sampling sessions, both HEPA filters placed in participants' homes will be run without the actual filter in the housing unit.
Altri nomi:
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Difference in reactive hyperemia measurement after HEPA filtration
Lasso di tempo: after 1 week of filtration
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Participants endothelial function are tested after 1 week of HEPA filtration and after 1 week of non-HEPA filtration (placebo filtration).
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after 1 week of filtration
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Difference in C-Reactive Protein after HEPA Filtration
Lasso di tempo: after 1 week of filtration
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Participants CRP is measured after 1 week of HEPA filtration and after 1 week of non-HEPA filtration (placebo filtration).
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after 1 week of filtration
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Collaboratori e investigatori
Sponsor
Investigatori
- Investigatore principale: Ryan Allen, PhD, Simon Fraser University, Canada
Pubblicazioni e link utili
Pubblicazioni generali
- Allen RW, Carlsten C, Karlen B, Leckie S, van Eeden S, Vedal S, Wong I, Brauer M. An air filter intervention study of endothelial function among healthy adults in a woodsmoke-impacted community. Am J Respir Crit Care Med. 2011 May 1;183(9):1222-30. doi: 10.1164/rccm.201010-1572OC. Epub 2011 Jan 21.
- Kajbafzadeh M, Brauer M, Karlen B, Carlsten C, van Eeden S, Allen RW. The impacts of traffic-related and woodsmoke particulate matter on measures of cardiovascular health: a HEPA filter intervention study. Occup Environ Med. 2015 Jun;72(6):394-400. doi: 10.1136/oemed-2014-102696. Epub 2015 Apr 20.
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Inizio studio
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- Allen,R-MOP111042
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .