Fig. 2From: Fine particulate matter constituents associated with emergency room visits for pediatric asthma: a time-stratified case–crossover study in an urban areaOdds ratios (ORs) and 95% confidence intervals (CIs) for pediatric asthma ED visits. The values are shown according to IQR increments in PM2.5 and the levels of its constituents, with adjustment for temperature and humidity. ED, emergency department; IQR, interquartile rangeBack to article page