Abbreviations: FVC, forced vital capacity; FEV1, forced expiratory
volume in 1 second; R5, resistance at 5 Hz; X5, reactance at 5 Hz; Fres,
resonant frequency; Di5-20, difference of resistance at 5 Hz and 20 Hz;
AX, area of reactance.
Table 3: Change on baseline in IOS parameters in
BDR-positive and BDR-negative patients.