Table 1.

Characteristics of the study group

Characteristic	COPD	Asthma	Asthma-COPD overlap	p
Subjects	35	9	5
Age, years (medians [interquartile range])	69.0 (66.0-80.0)	66.0 (62.0-68.0)	69.0 (66.0-67.0)	0.11
Sex, n				0.39
male	20 (57.1%)	3 (33.3%)	2 (40.0%)
female	15	6	3
Smoking, n				0.31
current smoker	25 (71.4%)	4 (44.4%)	3 (60.0%)
ex-smoker	10	5	2
Stadium of COPD, n				1.00
B	21 (60.0%)		3 (60.0%)
D	14		2

COPD – chronic obstructive pulmonary disease