Table 1

Demographic information for all patients and for those with full lung function tests stratified by degree of impairment of FEV₁

		All (n=110)		Impairment of FEV₁(n=108)
		All (n=110)		None (n=32)	Mild (n=19)	Moderate (n=36)	Severe (n=21)
Age^1-a	66.5 (60–72)	63 (58–69)	64 (57–69)	68 (62–74)	69 (63.5–75.5)
Male:female	64:46	15:17	10:9	20:16	18:3^1-160
Smoking status
Current	50	13 (41%)	10 (52.5%)	21 (58%)	5 (24%)
Ex	54	17 (53%)	7 (37%)	14 (39%)	15 (71%)^1-150
Never	6	2 (6%)	2 (10.5%)	1 (3%)	1 (5%)
Pack years^1-a	45 (23–70)	37 (16–60)	48 (22.5–104)	57 (32–81)	34 (20–75)
Treatment with inhaled steroids	53	11 (34%)	6 (32%)	17 (47%)	17 (81%)^1-165
Co-morbidity^1-b	44	10	10	13	11

↵1-a Data are median with interquartile range in parentheses.
↵1-b The total number of patients with co-morbidity is shown (see text for details).
↵1-150 p = 0.02,
↵1-160 p = 0.0035,
↵1-165 p<0.0005 compared with other groups.