Table. 1—

Subject baseline characteristics

MaleFemale
Subjects n1247733
Group assignment SI/UC309/938197/536
Age yrs48.3±6.948.3±6.6
Height cm176.6±6.5163.7±5.9
Weight kg81.8±13.065.2±11.5
Body mass index26.2±3.724.3±4.0
FEV1 L pre-bronchodilator2.96±0.442.08±0.35
FEV1 % pred pre-bronchodilator75.3±8.774.9±9.0
Change in FEV1 % pre-bronchodilator4.1±4.94.2±5.3
Two-point slope of methacholine curve−9.8±21.5−18.6±29.2
Cigarettes per day33.6±13.229.7±11.5
Pack-yrs43.3±19.336.9±17.6
  • Data are presented as mean±sd, unless otherwise stated. SI: special intervention; UC: usual care; FEV1: forced expiratory volume in one second; pred: predicted.