Fig. 3From: Ambient air pollutants and hospital visits for pneumonia: a case-crossover study in Qingdao, ChinaOdds ratio and 95% confidence interval for pneumonia admission associated with an interquartile range increment in air pollutant levels: Single-pollutant models. Notes: * P < 0.05; ** P < 0.01; *** P < 0.001. (A) PM2.5; (B) PM10; (C) SO2; (D) NO2; (E)COBack to article page