Open access
Research Article
1 January 2003

Air pollution and daily mortality in a city with low levels of pollution.

Publication: Environmental Health Perspectives
Volume 111, Issue 1
Pages 45 - 52

Abstract

The concentration-response relationship between daily ambient inhalable particle (particulate matter less than or equal to 10 micro m; PM(10)) concentrations and daily mortality typically shows no evidence of a threshold concentration below which no relationship is observed. However, the power to assess a relationship at very low concentrations of PM(10) has been limited in studies to date. The concentrations of PM(10) and other air pollutants in Vancouver, British Columbia, Canada, from January 1994 through December 1996 were very low: the 50th and 90th percentiles of daily average PM(10) concentrations were 13 and 23 micro g/m(3), respectively, and 27 and 39 ppb, respectively, for 1-hr maximum ozone. Analyses of 3 years of daily pollution (PM(10), ozone, sulfur dioxide, nitrogen dioxide, and carbon monoxide) concentrations and mortality counts showed that the dominant associations were between ozone and total mortality and respiratory and cardiovascular mortality in the summer, and between nitrogen dioxide and total mortality in the winter, although some association with PM(10) may also have been present. We conclude that increases in low concentrations of air pollution are associated with increased daily mortality. These findings may support the notion that no threshold pollutant concentrations are present, but they also raise concern that these effects may not be effects of the measured pollutants themselves, but rather of some other factor(s) present in the air pollution-meteorology mix.

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Information

Published In

Environmental Health Perspectives
Volume 111Issue 1January 2003
Pages: 45 - 52
PubMed: 12515678

History

Published online: 1 January 2003

Authors

Affiliations

Sverre Vedal
Department of Medicine, National Jewish Medical and Research Center, Denver, Colorado, USA. [email protected]
Michael Brauer
Department of Medicine, National Jewish Medical and Research Center, Denver, Colorado, USA. [email protected]
Richard White
Department of Medicine, National Jewish Medical and Research Center, Denver, Colorado, USA. [email protected]
John Petkau
Department of Medicine, National Jewish Medical and Research Center, Denver, Colorado, USA. [email protected]

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