Table 1—

Characteristics of the subjects

GroupYoung adultsControl subjectsPatients with emphysema
Subjects n1269
Sex M:F6:66:09:0
Age yrs22.7±1.0568.2±3.1271.1±1.05
Smoking pack-yrs037.2±6.269.6±12.3
FEV1 L3.62±0.272.19±0.210.75±0.07
FEV1 % pred98.3±3.4194.9±6.9434.3±3.21
VC % pred109.0±4.6195.1±8.8176.0±3.45
  • Data are presented as mean±sd unless otherwise stated

  • FEV1: forced expiratory volume in one second

  • VC: vital capacity

  • % pred: percentage of predicted. All long volumes were measured seated