Figure 2From: Pulmonary responses in current smokers and ex-smokers following a two hour exposure at rest to clean air and fine ambient air particles Barplot of D L CO changes as % point difference from baseline measured at 3 h and 22 h post-exposure. Black bars show estimated mean ± SEM at 0 μg/m3 of CA exposure and striped bars at 100 μg/m3 of CAFP exposure. Asterisk indicates significant difference between CA and CAFP exposures (11.1% decrease per 100 μg/m3, p = 0.035).Back to article page