Table 1—

Characteristics of the study group

Subjects n20
Age yrs66±6
Height cm165±6
Weight kg76±15
BMI kg·m−228±6
FEV1 L1.36±0.46
FEV1 % pred45±14
FEV1/FVC %46±11
RV/TLC %60±7
FRC % pred131±26
Pa,O2 mmHg74±11
Pa,CO2 mmHg41±6
  • Data are presented as mean±sd

  • BMI: body mass index

  • FEV1: forced expiratory volume in one second

  • FVC: forced vital capacity

  • RV: residual volume

  • TLC: total lung capacity

  • FRC: functional residual capacity

  • Pa,O2: oxygen tension in arterial blood

  • Pa,CO2: carbon dioxide tension in arterial blood

  • % pred: % predicted