Table 1

COPD preCOPD postp valueControlp valuep value
(pre–post COPD)(COPD pre–Control(COPD post–Control
CE at 4th intercostal level (median, cm)3.054.34p<0.014.81p<0.01p>0.05
CE at xiphoid process (median, cm)2.253.15p<0.013.9p<0.01p>0.05