Variables Mean ( Sd ) Range
Age, year 63 (8) 46-79
Body mass index, kg/m2 22.3 (3.5) 15-40
COPD duration, year 5.6 (2.69) 1-10
Smoking, packet/year 55(8.3) 25-100
*FEV1 change, % predicted 2,4(1.87) 0,20-6,90
FEV, % predicted 53.1 (12) 31-74.30
FVC,% predicted 70.6 (13) 38,30-98,00
FEV1/FVC 55.5 (8.6) 29,80-70,60
PEF % 51.6 (16) 17,10-79,50
FEF25-75 % 23.1 (7.9) 9,6-43,9
DLCO/VA, % predicted 56.3 (17) 28-78
Total SGRQ 54.4 (12,9) 21-73
*Reversibility testing with 400 μg inhaled salmeterol, COPD: chronic obstructive pulmonary disease, FEV1: forced expiratory volume in 1 second, FVC: Forced vital capacity, PEF: peak expiratory flow, FEF: forced expiratory flow, /VA: The Carbon monoxide diffusing capacity divided by alveolar volume, SGRQ; St. George‚Äôs respiratory questionnaire
Table 1: Demographic, Clinical and the Physiologic Characteristics of Patients