Table 1

Patients' characteristics

ControlCOPD
Subjects n916
Age yrs63±567±4
BMI kg·m−228±424±4*
FEV1 L3.50±0.691.06±0.39*
FEV1 % pred110±1339±16*
FVC L3.99±0.832.59±0.63*
FVC % pred98±1463±14*
FEV1/FVC %74±539±9*
TLC % pred121±19
Pa,O2 kPa10.4±1.2
Pa,CO2 kPa5.5±0.5
  • Data are presented as mean±sd

  • COPD: chronic obstructive pulmonary disease

  • BMI: body mass index

  • FEV1: forced expiratory volume in one second

  • % pred: % predicted

  • FVC: forced vital capacity

  • TLC: total lung capacity

  • Pa,O2: oxygen tension in arterial blood

  • Pa,CO2: carbon dioxide tension in arterial blood

  • *: p<0.05 compared to control subjects