Table 1—

Patient characteristics

Non-COPDCOPD
Subjects n59
Male/female5/08/1
Age yrs58±460±3
BMI kg·m−228±225±2
FEV1 % pred94±775±6
VC % pred93±697±8
FEV1/VC %77±259±2
TLC % pred93±3103±8
DL,CO/VA % pred99±1082±6
Pa,O2kPa11.4±0.511.6±0.3
Pa,CO2kPa5.4±0.45.0±0.2
  • Data are presented as mean±sem, unless otherwise stated. COPD: chronic obstructive pulmonary disease; BMI: body mass index; FEV1: forced expiratory volume in one second; % pred: % predicted; VC: vital capacity; TLC: total lung capacity; DL,CO/VA: diffusion capacity of the lung for carbon monoxide per unit of alveolar volume; Pa,O2: arterial oxygen tension; Pa,CO2: carbon dioxide arterial tension.