Table 1– Baseline patient characteristics
LVRSNon-LVRSp-value
Subjects n166
Age yrs67.0 (63.8–72.2)58.5 (55.3–60.8)0.02
Males %63170.15
FEV1 L0.79 (0.65–0.95)0.53 (0.48–0.68)0.03
FEV1 % pred24.5 (22.0–36.3)20.5 (17.5–22.8)0.03
TLC % pred125 (108–133)134 (128–144)0.08
RV % pred191 (161–250)235 (219–265)0.22
FRC/TLC %75 (73–79)81 (73–82)0.08
EELV/TLC at peak exercise0.86 (0.80–0.90)0.87 (0.84–0.89)0.82
Peak power W40.0 (34–59)30.0 (24–45)0.13
LVEF %55 (55–65)62.5 (45–65)0.42
BMI kg·m-227.0 (24.9–29.3)24.5 (20.3–27.5)0.20
Smoking history pack-years63.0 (42.3–85.0)60.0 (47.0–63.8)0.71
  • Data are expressed as median (interquartile range), unless otherwise stated. LVRS: lung volume reduction surgery; FEV1: forced expiratory volume in 1 s; % pred: % predicted; TLC: total lung capacity; RV: residual volume; FRC: functional residual capacity; EELV: end-expiratory lung volume; LVEF: left ventricular ejection fraction; BMI: body mass index.