ArticleBMJ open2015
Comparison of transient associations of air pollution and AMI hospitalisation in two cities of Alberta, Canada, using a case-crossover design.
Article in BMJ open, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.
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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.
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Who cites it
8 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.
- Systematic review and meta-analysis of case-crossover and time-series studies of short term outdoor nitrogen dioxide exposure and ischemic heart disease morbidity.Environmental health : a global access science source · 2020Pooled it
- Urban-rural disparity of the short-term association of PMInnovation (Cambridge (Mass.)) · 2021Article
- Effects of Asian dust-derived particulate matter on ST-elevation myocardial infarction: retrospective, time series study.BMC public health · 2021Article
- Association between ambient air pollution and out-of-hospital cardiac arrest: are there potentially susceptible groups?Journal of exposure science & environmental epidemiology · 2020Article
- Air Pollution and Cardiovascular Disease: A Focus on Vulnerable Populations Worldwide.Current epidemiology reports · 2018Article
- Air pollution and admissions due to ST elevation myocardial infarction-a time-series study from northwest of Iran.Environmental science and pollution research international · 2017Article
- Acute Effects of Particulate Air Pollution on Ischemic Heart Disease Hospitalizations in Shanghai, China.International journal of environmental research and public health · 2017Article
- Potential Harmful Effects of PM2.5 on Occurrence and Progression of Acute Coronary Syndrome: Epidemiology, Mechanisms, and Prevention Measures.International journal of environmental research and public health · 2016Review
Corrections and comments
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTo investigate reproducibility of outcomes for short-term associations between ambient air pollutants and acute myocardial infarction (AMI) hospitalisation in 2 urban populations.
designUsing a time-stratified design, we conducted independent case-crossover studies of AMI hospitalisation events over the period 1999-2010 in the geographically close and demographically similar cities of Calgary and Edmonton, Alberta, Canada. Patients with his/her first AMI hospitalisation event were linked with air pollution data from the National Ambient Pollution Surveillance database and meteorological data from the National Climatic Data Center database. Patients were further divided into subgroups to examine adjusted pollution effects. Effects of pollution levels with 0-3-day lag were modelled using conditional logistic regression and adjusted for daily average ambient temperature, dew point temperature and wind speed.
settingPopulation-based studies in Calgary/Edmonton.
participants12,066/10,562 first-time AMI hospitalisations in Calgary/Edmonton.
main outcome measuresAssociation (adjusted OR) between daily ambient air pollution levels and hospitalisation for AMI.
resultsAmong 600 potential air pollution effect variables investigated for the Calgary (Edmonton) population, only 1.17% (0.67%) was statistically significant by using the traditional 5% criterion. None of the effect variables were reproduced in the 2 cities, despite their geographic closeness (within 300 km of each other), and demographic and air pollution similarities.
conclusionsComparison of independent investigations of the effect of air pollution on risk of AMI hospitalisation in Calgary and Edmonton, Alberta, indicated that none of the air pollutants investigated-CO, NO, NO2, O3 and particulate matter (PM2.5)-showed consistent positive associations with increased risk of AMI hospitalisation.
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