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

Abstract

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

References

  • References21
  • Citations6

Citations

Mentioned in this Paper

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

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