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Int. J. Environ. Res. Public Health 2010, 7(11), 4078-4088; doi:10.3390/ijerph7114078

Ambient Ozone and Emergency Department Visits for Cellulitis

1
Population Studies Division, Health Canada, 269 Laurier Avenue, Ottawa, ON K1A 0K9, Canada
2
Departments of Medicine and Community Health Sciences, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 1N4, Canada
3
Department of Emergency Medicine, University of Alberta, 8440-112 Street, Edmonton, AB T6G 2B7, Canada
4
School of Public Health, University of Alberta, 8440-112 Street, Edmonton, AB T6G 2B7, Canada
*
Author to whom correspondence should be addressed.
Received: 10 October 2010 / Revised: 12 November 2010 / Accepted: 16 November 2010 / Published: 19 November 2010
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Abstract

Objectives were to assess and estimate an association between exposure to ground-level ozone and emergency department (ED) visits for cellulitis. All ED visits for cellulitis in Edmonton, Canada, in the period April 1992–March 2002 (N = 69,547) were examined. Case-crossover design was applied to estimate odds ratio (OR, and 95% confidence interval) per one interquartile range (IQR) increase in ozone concentration (IQR = 14.0 ppb). Delay of ED visit relating to exposure was probed using 0- to 5-day exposure lags. For all patients in the all months (January–December) and lags 0 to 2 days, OR = 1.05 (1.02, 1.07). For male patients during the cold months (October-March): OR = 1.05 (1.02, 1.09) for lags 0 and 2 and OR = 1.06 (1.02, 1.10) for lag 3. For female patients in the warm months (April-September): OR = 1.12 (1.06, 1.18) for lags 1 and 2. Cellulitis developing on uncovered (more exposed) skin was analyzed separately, observed effects being stronger. Cellulitis may be associated with exposure to ambient ground level ozone; the exposure may facilitate cellulitis infection and aggravate acute symptoms.
Keywords: cellulitis; skin infection; emergency department visit; ozone; bacteria; urban cellulitis; skin infection; emergency department visit; ozone; bacteria; urban
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Szyszkowicz, M.; Porada, E.; Kaplan, G.G.; Rowe, B.H. Ambient Ozone and Emergency Department Visits for Cellulitis. Int. J. Environ. Res. Public Health 2010, 7, 4078-4088.

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