This study is part of a larger research program to examine the relationship between ambient air quality and health in Windsor, Ontario, Canada. We assessed the association between air pollution and daily respiratory hospitalization for different age and sex groups from 1995 to 2000. The pollutants included were nitrogen dioxide, sulfur dioxide, carbon monoxide, ozone, particulate matter 10 microm in diameter (PM10), coefficient of haze (COH), and total reduced sulfur (TRS). We calculated relative risk (RR) estimates using both time-series and case-crossover methods after controlling for appropriate confounders (temperature, humidity, and change in barometric pressure). The results of both analyses were consistent. We found associations between NO2, SO2, CO, COH, or PM10 and daily hospital admission of respiratory diseases especially among females. For females 0-14 years of age, there was 1-day delayed effect of NO2 (RR = 1.19, case-crossover method), a current-day SO2 (RR = 1.11, time series), and current-day and 1- and 2-day delayed effects for CO by case crossover (RR = 1.15, 1.19, 1.22, respectively). Time-series analysis showed that 1-day delayed effect of PM10 on respiratory admissions of adult males (15-64 years of age), with an RR of 1.18. COH had significant effects on female respiratory hospitalization, especially for 2-day delayed effects on adult females, with RRs of 1.15 and 1.29 using time-series and case-crossover analysis, respectively. There were no significant associations between O3 and TRS with respiratory admissions. These findings provide policy makers with current risks estimates of respiratory hospitalization as a result of poor ambient air quality in a government designated "area of concern."
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Cites: Am Rev Respir Dis. 1980 Jan;121(1):3-107352711
Cites: Am J Epidemiol. 1999 Aug 1;150(3):255-6210430229
Cites: Am J Epidemiol. 1991 Jan 15;133(2):144-531985444
Cites: N Engl J Med. 1993 Dec 9;329(24):1753-98179653
Cites: Thorax. 1994 Feb;49(2):133-408128402
Cites: Environ Res. 1994 May;65(2):172-948187735
Cites: Eur Respir J. 1994 Mar;7(3):477-838013605
Cites: Am J Respir Crit Care Med. 1994 Sep;150(3):648-558087333
Cites: Am J Respir Crit Care Med. 1994 Nov;150(5 Pt 1):1219-217952543
Cites: Am J Respir Crit Care Med. 1994 Nov;150(5 Pt 1):1256-617952549
Cites: Epidemiology. 1996 Jan;7(1):20-88664396
Cites: J Epidemiol Community Health. 1996 Apr;50 Suppl 1:s22-98758220
Cites: Environ Health Perspect. 1999 Aug;107(8):629-3110417359
Cites: Environ Health Perspect. 1999 Aug;107(8):633-610417360