Fig. 2From: Lung function and systemic inflammation associated with short-term air pollution exposure in chronic obstructive pulmonary disease patients in Beijing, ChinaChanges in FVC % pred in COPD patients with a 1 SD increase in PM2.5 a, PM10 b, NO2 c, SO2 d, CO e and O3 f levels using the cumulative lag model. Notes: Error bars indicate 95% CIs. *p < 0.05; **p < 0.01Back to article page