Ambient Ozone and Emergency Department Visits for Cellulitis

Mieczysław Szyszkowicz, Eugeniusz Porada, Gilaad G. Kaplan and Brian H. Rowe
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Mieczysław Szyszkowicz: Population Studies Division, Health Canada, 269 Laurier Avenue, Ottawa, ON K1A 0K9, Canada
Eugeniusz Porada: Population Studies Division, Health Canada, 269 Laurier Avenue, Ottawa, ON K1A 0K9, Canada
Gilaad G. Kaplan: Departments of Medicine and Community Health Sciences, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 1N4, Canada
Brian H. Rowe: Department of Emergency Medicine, University of Alberta, 8440-112 Street, Edmonton, AB T6G 2B7, Canada

IJERPH, 2010, vol. 7, issue 11, 1-11

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 (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2010
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