ArticleBuilding and environment2011
Particle Concentrations and Effectiveness of Free-Standing Air Filters in Bedrooms of Children with Asthma in Detroit, Michigan.
Article in Building and environment, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
32 citing papers in PubMed, 3 syntheses or guidelines pooled it, 75 citations in OpenAlex.
- Effectiveness of particulate matter filtration: systematic review and meta-analysis.Revista brasileira de enfermagem · 2026Pooled it
- Indoor Particulate Matter in Urban Households: Sources, Pathways, Characteristics, Health Effects, and Exposure Mitigation.International journal of environmental research and public health · 2021Pooled it
- Effectiveness of Interventions to Reduce Tobacco Smoke Pollution in Homes: A Systematic Review and Meta-Analysis.International journal of environmental research and public health · 2015Pooled it
- Reductions in particulate matter concentrations resulting from air filtration: A randomized sham-controlled crossover study.Indoor air · 2022Trial
- The School Inner-City Asthma Intervention Study: Design, rationale, methods, and lessons learned.Contemporary clinical trials · 2017Trial
- A Randomized Cross-over Air Filtration Intervention Trial for Reducing Cardiovascular Health Risks in Residents of Public Housing near a Highway.International journal of environmental research and public health · 2015Trial
- Particulate matter concentrations in residences: an intervention study evaluating stand-alone filters and air conditioners.Indoor air · 2012Trial
- Effectiveness of enhanced filtration interventions for improving indoor air quality in child-serving facilities.Frontiers in pediatrics · 2026Article
- Parental Report of Indoor Air Pollution Is Associated with Respiratory Morbidities in Bronchopulmonary Dysplasia.The Journal of pediatrics · 2024Article
- Article
- Room-Based Assessment of Mobile Air Cleaning Devices Using a Bioaerosol Challenge.Applied biosafety : journal of the American Biological Safety Association · 2023Article
- Portable air cleaner use and biomarkers of inflammation: A systematic review and meta-analysis.American heart journal plus : cardiology research and practice · 2022Article
- Assessing effectiveness of air purifiers (HEPA) for controlling indoor particulate pollution.Heliyon · 2021Article
- Evaluation on Air Purifier's Performance in Reducing the Concentration of Fine Particulate Matter for Occupants according to its Operation Methods.International journal of environmental research and public health · 2020Article
- Health risk assessment of VOC emissions in laboratory rooms via a modeling approach.Environmental science and pollution research international · 2018Article
- The feasibility of an air purifier and secondhand smoke education intervention in homes of inner city pregnant women and infants living with a smoker.Environmental research · 2018Article
- Recent advances in environmental controls outside the home setting.Current opinion in allergy and clinical immunology · 2016Review
- Article
- Article
- Estimation of bias with the single-zone assumption in measurement of residential air exchange using the perfluorocarbon tracer gas method.Indoor air · 2015Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 3 institutions in 2 countries.
Funding
Abstract
Asthma can be exacerbated by environmental factors including airborne particulate matter (PM) and environmental tobacco smoke (ETS). We report on a study designed to characterize PM levels and the effectiveness of filters on pollutant exposures of children with asthma. 126 households with an asthmatic child in Detroit, Michigan, were recruited and randomized into control or treatment groups. Both groups received asthma education; the latter also received a free-standing high efficiency air filter placed in the child's bedroom. Information regarding the home, emission sources, and occupant activities was obtained using surveys administered to the child's caregiver and a household inspection. Over a one-week period, we measured PM, carbon dioxide (CO(2)), environmental tobacco smoke (ETS) tracers, and air exchange rates (AERs). Filters were installed at midweek. Before filter installation, PM concentrations averaged 28 µg m(-3), number concentrations averaged 70,777 and 1,471 L(-1) in 0.3-1.0 and 1-5 µm size ranges, respectively, and the median CO(2) concentration was 1,018 ppm. ETS tracers were detected in 23 of 38 homes where smoking was unrestricted and occupants included smokers and, when detected, PM concentrations were elevated by an average of 15 µg m(-3). Filter use reduced PM concentrations by an average of 69 to 80%. Simulation models representing location conditions show that filter air flow, room volume and AERs are the key parameters affecting PM removal, however, filters can achieve substantial removal in even "worst" case applications. While PM levels in homes with asthmatic children can be high, levels can be dramatically reduced using filters.
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.