Table 1. Participant characteristics

Characteristics	Total(N = 2143), %	With a respiratory condition(n = 1081), %	Without a respiratory condition(n = 1062), %	P value(χ2 test)
Age, years
50–59	43.4	46.2	40.5	<0.05
60–69	36.8	35.3	38.2
≥70	19.9	18.5	21.3
Sex
Male	48.6	42.8	54.4	<0.001
Female	51.4	57.2	45.6	<0.001
Education
No qualifications	9.2	10.6	7.7	0.06
Secondary	46.3	46.4	46.3
Higher education	44.5	43.1	46.0
Marital status
Single	38.5	39.0	38.1	0.7
Married or living with partner	61.5	61.1	61.9	0.7
Ethnic group
White	97.0	97.2	96.8	0.6
Other	3.2	2.8	3.2	0.6
Region
England	84.2	83.2	85.3	0.2
Scotland	8.7	9.9	7.4
Wales	4.8	4.8	4.7
Northern Ireland	2.3	2.1	2.5
Smoking
Current smoker	18.3	22.0	14.5	<0.001
Previous smoker	40.7	42.8	38.5
Never smoked	41.0	35.2	47.0
Other health conditions, n
0	22.9	18.4	27.5	<0.001
1	21.4	19.9	22.9
2	20.0	19.2	20.7
≥3	35.7	42.5	28.9
Type of respiratory condition
Asthma		63.6
COPD		24.4
COPD and asthma		11.7
Primary care management for respiratory condition
Yes		81.7
No		18.3
Secondary care management for respiratory condition
Yes		14.8
No		85.2
Over-the-counter medication taken for respiratory condition
Yes		3.0
No		97.0
Respiratory condition limits daily activities
Never or rarely		47.2
Sometimes		30.9
Very often or always		21.9
Duration of respiratory condition, years
≤5		25.9
>5		74.1