Table 4

 Comparison of collateral and no collateral ventilation lungs

Collateral ventilation(n = 15)No collateral ventilation(n = 8)p value
Data are presented as mean (SD) or median (interquartile range).
FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; RV, residual volume; TLC, total lung capacity; Tlco, carbon monoxide transfer factor; Pao2, Paco2, arterial oxygen and carbon dioxide tensions.
Age56.3 (5.07)58.0 (6.14)0.49
M:F11:46:20.95
Pack years30 (24–70)42 (27–75)0.46
FEV1 (l)0.65 (0.22)0.58 (0.16)0.42
FEV1 (% predicted)20.8 (6.30)20.0 (6.80)0.78
FVC (l)2.20 (0.54)2.04 (0.81)0.59
FVC (% predicted)57.0 (12)56.0 (21)0.91
FEV1/FVC0.30 (0.06)0.30 (0.07)0.91
RV (l)5.29 (0.83)5.37 (1.87)0.88
RV (% predicted)258 (33)264 (79)0.79
TLC (l)8.04 (1.36)8.09 (2.04)0.94
TLC (% predicted)132 (12)134 (16)0.73
Tlco (ml/min/mmHg)7.8 (2.3)8.8 (2.6)0.36
Tlco (% predicted)28.0 (8)28.5 (10)0.35
Pao2 (kPa)8.8 (1.6)9.3 (2.0)0.41
Paco2 (kPa)7.1 (1.1)6.9 (1.7)0.89
6 min walk (m)314 (280–360)339 (247–388)0.75