Table 1.

Subject characteristics

Number	174
Women / men	70 / 104
Age, years
Mean ± SD	64.3 ± 12
Range	28–80
FEV1, L
Mean ± SD	1.76 ± 0.78
Range	0.46 – 4.12
FEV1, % pred
Mean ± SD	62 ± 20
Range	18–118
GOLD classification
Number of subjects:
Stage I	19
Stage IIA	82
Stage IIB	32
Stage III	9