TABLE 1.

Patient characteristics

Characteristic	Mean ± SD
Age, years	69±10
Body mass index, kg/m2	27±8
Forced expiratory volume in 1 s, % predicted	46±21
Forced vital capacity, % predicted	78±23
DLCO, % predicted	49±22
Functional residual capacity, % predicted	141±54

DL_CO Single breath diffusing capacity of the lung for carbon monoxide