Fig. 9From: Clinical validation of controlled exposure to house dust mite in the environmental exposure unit (EEU)Percent PNIF change from baseline in light of HDM exposure. HDM-allergic participants exposed to a higher HDM target experienced a significant reduction in percent PNIF change from baseline at 2 h (p < 0.05), 2.5 h (p < 0.05) and 3 h (p < 0.01) compared to healthy controls. Allergic participants exposed to a modest HDM target experienced no significant changes in percent PNIF change from baseline relative to control. Comparisons between high target allergics and non-allergics by “‡”. ‡ = p < 0.05, ‡‡ = p < 0.01Back to article page