Table 1. Characteristics of patients with COPD and the whole population.

Variable	Category	All	COPD
Total patient no.	—	2,839,694	92,576
Agea (mean, years)	—	54.8	70.5
Agea (%)	35–39	21.4	0.6
	40–49	24.2	3.8
	50–59	19.8	12.9
	60–69	15.0	27.3
	70–79	11.5	33.8
	80–89	8.2	21.6
Gender (%)	Male	49.1	53.8
	Female	50.9	46.2
Smoking (%)	Non	53.2	14.4
	Active	21.2	32.6
	Ex	25.7	53.0
Townsend quintile (%)	1 (least deprived)	27.1	16.5
	2	22.8	18.1
	3	20.8	21.3
	4	17.6	23.8
	5 (most deprived)	11.8	20.3
FEV1 (mean, l)	—	—	1.4
FVC (mean, l)	—	—	2.4

Abbreviations: COPD, chronic obstructive pulmonary disease; FEV₁, forced expiratory volume in 1 s; FVC, forced vital capacity.

^aAge was determined at the mid-point of each patient’s observation period.