ArticleEnvironmental health : a global access science source2007
Outdoor air pollution and emergency department visits for asthma among children and adults: a case-crossover study in northern Alberta, Canada.
Article in Environmental health : a global access science source, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers, 8 of them syntheses that pooled it.
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Who cites it
71 citing papers in PubMed, 8 syntheses or guidelines pooled it.
- A national burden assessment of estimated pediatric asthma emergency department visits that may be attributed to elevated ozone levels associated with the presence of smoke.Environmental monitoring and assessment · 2019Pooled it
- Effect of outdoor air pollution on asthma exacerbations in children and adults: Systematic review and multilevel meta-analysis.PloS one · 2017Pooled it
- Short-term Effect of Fine Particulate Matter on Children's Hospital Admissions and Emergency Department Visits for Asthma: A Systematic Review and Meta-analysis.Journal of preventive medicine and public health = Yebang Uihakhoe chi · 2016Pooled it
- Who is more affected by ozone pollution? A systematic review and meta-analysis.American journal of epidemiology · 2014Pooled it
- Case-crossover analysis of air pollution health effects: a systematic review of methodology and application.Environmental health perspectives · 2010Pooled it
- Air pollution, aeroallergens, and emergency room visits for acute respiratory diseases and gastroenteric disorders among young children in six Italian cities.Environmental health perspectives · 2009Pooled it
- The population attributable fraction of asthma among Canadian children.Canadian journal of public health = Revue canadienne de sante publiquePooled it
- The effects of outdoor air pollution on the respiratory health of Canadian children: A systematic review of epidemiological studies.Canadian respiratory journalPooled it
- The Study of Allergic Reactions in Mice Induced by Particulate Matter from Duck Houses.Veterinary sciences · 2026Article
- Long-Term Air Pollution Exposure, Plant-based Diet, and Asthma Exacerbations in the Nurses' Health Study II.Annals of the American Thoracic Society · 2026Article
- Genetic susceptibility to PMFrontiers in immunology · 2026Article
- Impacts of short-term exposure to ambient air pollutants on outpatient visits for respiratory diseases in children: a time series study in Yichang, China.Environmental health and preventive medicine · 2025Article
- Air Quality Geospatial Analysis in Vulnerable Areas. Case Study of Valencia (Spain).International journal of environmental research and public health · 2024Article
- The Role of Neighborhood Air Pollution in Disparate Racial and Ethnic Asthma Acute Care Use.American journal of respiratory and critical care medicine · 2024Article
- Short-Term Nitrogen Dioxide Exposure and Emergency Hospital Admissions for Asthma in Children: A Case-Crossover Analysis in England.Journal of asthma and allergy · 2024Article
- PMGut microbes · 2023Article
- Prediction of the number of asthma patients using environmental factors based on deep learning algorithms.Respiratory research · 2023Article
- Ambient Air Pollution and Risk of Admission Due to Asthma in the Three Largest Urban Agglomerations in Poland: A Time-Stratified, Case-Crossover Study.International journal of environmental research and public health · 2022Article
- Predicting the protective behavioral intentions for parents with young children that possess different levels of education in Hong Kong using the theory of planned behavior for air polluted with PMBMC public health · 2022Article
- Associations between meteorological factors and emergency department visits for unintentional falls during Ontario winters.Health promotion and chronic disease prevention in Canada : research, policy and practice · 2021Article
11 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundRecent studies have observed positive associations between outdoor air pollution and emergency department (ED) visits for asthma. However, few have examined the possible confounding influence of aeroallergens, or reported findings among very young children.
methodsA time stratified case-crossover design was used to examine 57,912 ED asthma visits among individuals two years of age and older in the census metropolitan area of Edmonton, Canada between April 1, 1992 and March 31, 2002. Daily air pollution levels for the entire region were estimated from three fixed-site monitoring stations. Similarly, daily levels of aeroallergens were estimated using rotational impaction sampling methods for the period between 1996 and 2002. Odds ratios and their corresponding 95% confidence intervals were estimated using conditional logistic regression with adjustment for temperature, relative humidity and seasonal epidemics of viral related respiratory disease.
resultsPositive associations for asthma visits with outdoor air pollution levels were observed between April and September, but were absent during the remainder of the year. Effects were strongest among young children. Namely, an increase in the interquartile range of the 5-day average for NO2 and CO levels between April and September was associated with a 50% and 48% increase, respectively, in the number of ED visits among children 2 - 4 years of age (p < 0.05). Strong associations were also observed with these pollutants among those 75 years of age and older. Ozone and particulate matter were also associated with asthma visits. Air pollution risk estimates were largely unchanged after adjustment for aeroallergen levels.
conclusionOur findings, taken together, suggest that exposure to ambient levels of air pollution is an important determinant of ED visits for asthma, particularly among young children and the elderly.
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