Figure 3
End-expiratory lung volume and total lung capacity ratio (EELV/TLC) at rest, unloading, near anaerobic threshold, and near peak exercise as a function of tidal volume at peak exercise and TLC ratio (VTpeak/TLC) in 23 subjects with COPD and 19 normal subjects. The solid line represents the linear regression line (r = −0.83, p < 0.0001 for the COPD group and r = −0.13, p = 0.36 for the normal subjects) and the curved lines are the 95% CI lines.
