Fig. 2: Correlation between PIF/PEF and lung function.
From: Interaction of BMI and respiratory status in obstructive sleep apnea, a cross-sectional COPD study
Correlation between PIF/PEF and FEV1 a, RV/TLC b, and apnea and hypopnea formation c. REI respiratory event index, PIF/PEF peak inspiratory flow divided by peak expiratory flow, RV/TLC residual volume divided by total lung capacity, FEV1 forced expiratory volume in one second.
