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Figure 2 | Environmental Health

Figure 2

From: Outdoor air pollution and emergency department visits for asthma among children and adults: A case-crossover study in northern Alberta, Canada

Figure 2

Associations between asthma visits and levels of NO2 and CO. Adjusted odds ratios obtained from a two-pollutant model in relation to an increase in the interquartile range of 5-day average concentration of NO2 and CO, Edmonton, April 1 to September 30, 1992 to 2002; Adjusted for relative humidity, temperature and daily number of emergency department visits for influenza.

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Environmental Health

ISSN: 1476-069X