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Comparison of the frequency of triple therapy among the groups divided by LAA% on quantitative CT analysis.
Notes: No emphysema (LAA% <10, n=121), mild emphysema (10≤ LAA% <20, n=70), moderate emphysema (20≤ LAA% <30, n=52), and severe emphysema (LAA% ≥30, n=48). The frequency becomes significantly higher as the severity of emphysema increases (P<0.01).
Abbreviations: LAA, low-attenuation area; CT, computed tomography.
