Association Between Particulate Air Pollution and First Hospital Admission for Childhood Respiratory Illness in Vancouver, Canada.

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    • Abstract:
      The article focuses on a study in which the authors assessed the impact of particulate air pollution on first respiratory hospitalization. Study subjects were children less than 3 years of age living in Vancouver, British Columbia, who had their first hospitalization as a result of any respiratory disease during the period from June 1, 1995, to March 31, 1999. The present study used the case-control approach to adjust for individual confounders such as gender and socioeconomic status. Socioeconomic inequalities in mortality and morbidity have been found in Europe and in Brazil. A study conducted in the U.S. found that race, gender, and social status modified the effects of particulate matter (PM) on mortality. It also used the case crossover design and time-series analysis to examine the association between PM and respiratory admissions. The analytic approach used in this study resembled that of a semi-individual study in that a broad range of individual-level data were available for all subjects. The issue of possible misclassification is not unique to this study, but is a general concern in environmental epidemiology.