Figure 2
From: Antioxidant airway responses following experimental exposure to wood smoke in man
BAL and BW concentrations of glutathione (GSH). Glutathione (GSH) concentrations in BW and BAL fluid samples obtained from subjects 24 hours after exposure to wood smoke (mean 224 μg/m3 PM2.5) or filtered air for 3 hours. Individual responses, as well as group medians, with inter-quartile ranges and 95-percentage confidence intervals are illustrated. Comparisons of the concentrations after air versus after wood smoke were performed using the Wilcoxon's Signed Rank test. P values are illustrated where these were significant. Non-significant responses (NS) are also shown.