Figure 1From: Identification of acid reflux cough using serial assays of exhaled breath condensate pHRepeated exhaled breath condensate pH (after gas standardization) before and after pharyngeal challenge by means of an acidic drink (Figure 1A) and after a water control (Figure 1B). EBC pH is transiently low after acid challenge, lasting approximately 10 to 15 minutes. * indicates significant differences from baseline (ANOVA on Ranks with Dunn's test, at p = 0.05).Back to article page