Jul 20, 2007

Air pollution and emergency department visits for ischemic heart disease in Montreal, Canada

International Journal of Occupational Medicine and Environmental Health
Mieczysław Szyszkowicz


We examined the associations between emergency department (ED) visits for ischemic heart disease (IHD) and short-term elevations in ambient air pollutants (CO and NO(2)). A hierarchical clusters design was used to study ED visits (n = 4979) for ischemic heart disease (ICD-9: 410-414) that occurred at a Montreal hospital between 1997 and 2002. The generalized linear mixed models technique was applied to create Poisson models for the clustered counts of ED visits for IHD. The analysis was done by gender for two age categories, all patients and patients aged over 64 years. The results are presented as an excess risk increase associated with the interquartile range (IQR) of daily average of the pollutant concentration. The results for NO(2) (IQR = 9.5 ppb) were 5.9% (95% CI: 2.1-9.9) for all patients and 6.2% (95% CI: 1.2-11.4) for males; for patients aged over 64: 7.1% (95% CI: 2.5-11.9) for all patients, 9.1% (95% CI: 2.8-15.7) for males, and 6.5% (95% CI: 0.7-12.7) for females (for exposure lagged by 1-day). The results for CO (IQR = 0.2 ppm): 5.4% (95% CI: 2.3-8.5) for all patients, and 7.5% (95% CI: 3.6-11.6) for males. For patients aged over 64 years, 4.9% (95% CI: 1.3-8.7) for all patients, and 7.5% (95% CI: 2.6-12.6) for ma...Continue Reading

  • References21
  • Citations6


  • References21
  • Citations6


Mentioned in this Paper

Log-Linear Models
Air Pollutants, Environmental
Myocardial Ischemia
Carbon Monoxide
Sex Distribution
Nitrogen Dioxide
Accident and Emergency Department
Emergencies [Disease/Finding]
Age Distribution

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Synthetic Genetic Array Analysis

Synthetic genetic arrays allow the systematic examination of genetic interactions. Here is the latest research focusing on synthetic genetic arrays and their analyses.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

Head And Neck Squamous Cell Carcinoma

Squamous cell carcinomas account for >90% of all tumors in the head and neck region. Head and neck squamous cell carcinoma incidence has increased dramatically recently with little improvement in patient outcomes. Here is the latest research on this aggressive malignancy.

Signaling in Adult Neurogenesis

Neural stem cells play a critical role in the production of neuronal cells in neurogenesis is of great importance. Of interest is the role signalling mechanisms in adult neurogenesis. Discover the latest research on signalling in adult neurogenesis.

Psychiatric Chronotherapy

Psychiatric Chronotherapy considers the circadian rhythm as a major factor for optimizing therapeutic efficacy of psychiatric interventions. Discover the latest research on Psychiatric Chronotherapy here.

Epigenetic Memory

Epigenetic memory refers to the heritable genetic changes that are not explained by the DNA sequence. Find the latest research on epigenetic memory here.

Bone Marrow Neoplasms

Bone Marrow Neoplasms are cancers that occur in the bone marrow. Discover the latest research on Bone Marrow Neoplasms here.

Related Papers

European Heart Journal
Bert Brunekreef
International Journal of Cardiology
Rachel Nicoll, Michael Henein
International Journal of Occupational Medicine and Environmental Health
Mieczysław Szyszkowicz, Brian H Rowe
Current Vascular Pharmacology
Rachel Nicoll, Michael Henein
© 2020 Meta ULC. All rights reserved