Figure 2. Distribution of Log₁₀C₂ and Log₁₀C₅ in bronchiectasis patients and healthy subjects.

The capsaicin cough sensitivity, calculated as the capsaicin concentration causing at least 2 (C₂) and 5 (C₅), was compared between bronchiectasis patients and healthy subjects. Bronchiectasis patients yielded markedly lower levels of C₂ and C₅, suggesting significantly higher capsaicin cough sensitivity than healthy subjects. The lines of the bar in each figure represented the 25% percentile, median and 75% percentile, respectively. Figure 2-A, distribution of Log₁₀C₂, Figure 2-B, Distribution of Log₁₀C₅. The asterisks in both Figures 2-A and 2-B denoted P<0.01.