Controls | COPD group | |
Subjects n | 7 | 9 |
Age yrs | 65±3 | 68±2 |
Height cm | 168±3 | 167±2 |
Weight kg | 75.3±4.2 | 73.4±4.3 |
BMI kg·m−2 | 26.5±1.0 | 26.3±1.3 |
FEV1 % pred | 86±3 | 52±4*** |
FVC % pred | 84±2 | 61±5** |
TLC % pred | 91±3 | 102±7 |
RV % pred | 100±9 | 155±21* |
ITGV % pred | 102±7 | 129±17 |
PI,max % pred | 82±22 | 86±26 |
Poes,max cmH2O | −76±14 | −67±22 |
Pdi,max cmH2O | 99±19 | 88±58 |
Data are presented as mean±sd
COPD: chronic obstructive pulmonary disease
BMI: body mass index
FEV1: forced expiratory volume in one second
FVC: forced vital capacity
TLC: total lung capacity
RV: residual volume
ITGV: intrathoracic gas volume
PI,max: maximal inspiratory pressure measured at the mouth (Müller manoeuvre)
Poes,max: maximal oesophageal pressure during sniff manoeuvre
Pdi,max: maximal transdiaphragmatic pressure during sniff manoeuvre
% pred: percentage of the predicted value
*: p<0.05
**: p<0.01
***: p<0.001 versus controls