Fig. 2
From: Malondialdehyde and anion patterns in exhaled breath condensate among subway workers
Effect of the professional activity (left panel) and the day of the week (right panel) on the predicted EBC levels of acetate (A), for the nitrite/nitrate ratio (B), lactate (C) and ΣNOx (D), either for pre- or post-shift. * denotes a statistically significant difference (p < 0.05) with station agents, considered as reference. †denotes a statistically significant difference (p < 0.05) with the first day of the week, considered as reference