Visual emphysema score r value p value
FEV1 % -0,560 P<0,0001
FVC % -0,376 P<0,001
FEV1/FVC -0,426 P<0,0001
PEF% -0,439 P<0,0001
FEF 25-75 % -0,421 P<0,0001
*FEV1 change, % predicted -0,125 0,265
DLCO/VA -0,497 P<0,001
pH -0,135 P=0,228
PaO2 (mmHg) -0,398 P<0,0001
PaCO2 (mmHg) 0,360 0,001
Sat O2 (%) -0,355 0,001
Total SGRQ 0,118 0,257
Smoking pack/ years 0.586 P<0,0001
*Reversibility testing with 400 μg inhaled salmeterol, , FEV1: forced expiratory volume in 1 second, FVC: Forced vital capacity, PEF: peak expiratory flow, FEF: forced expiratory flow, DLCO/VA: The Carbon monoxide diffusing capacity divided by alveolar volume, Sat O2: oxygen saturation, SGRQ; St. George‚Äôs respiratory questionnaire
Table 3: Relationship Between Functional Variables and Emphysema Extent as Assessed by HRCT Scan