TABLE 1.

CLINICAL CHARACTERISTICS OF STUDY SUBJECTS

	COPD (n = 14)	Control Subjects (n = 17)	P Value (COPD vs. Control Subjects)
Age, yr	57 ± 8.9	56 ± 9.2	NS
Sex (% male)	69	64	NS
Smoker (ex or current)	100%	47%	<0.01
FEV1 PP	69 ± 7	104 ± 11	<0.001
FEV1/FVC	58 ± 8.3	79 ± 3.8	<0.001

Definition of abbreviations: COPD = chronic obstructive pulmonary disease; NS = not significant; PP = percent predicted.

Data are presented as percentage value or mean ± SD as appropriate.