TABLE 1.

Association between European Community Respiratory Health Survey (ECRHS) II vigorous activity status, frequency and duration, change in vigorous activity status and ECRHS III current asthma, asthma-like symptoms, and bronchodilator reversibility in middle-aged adults

	Current asthma at ECRHS III n (%)	Risk of current asthma, adjusted analyses# (95% CI)	More than three asthma-like symptoms at ECRHS III (%)	Risk of asthma-like symptoms, adjusted (95% CI)#	Bronchodilator reversibility present at ECRHS III n (%)	Risk of bronchodilator reversibility, adjusted analyses# (95% CI)
Subjects n	3129	2757	3057	2695	2451	2148
Activity status
Not vigorously active	182 (8.9)	1.00	54 (2.8)	1.00	38 (2.5)	1.00
Vigorously active	102 (8.4)	0.96 (0.75–1.23)	22 (1.9)	0.71 (0.42–1.18)	21 (2.2)	0.82 (0.46–1.47)
Frequency of vigorous activity
Once a month or less	120 (9.1)	1.00	36 (2.8)	1.00	25 (2.6)	1.00
1–3 times per week	120 (7.7)	0.94 (0.73–1.22)	31 (2.1)	0.78 (0.48–1.28)	29 (2.4)	0.86 (0.49–1.50)
≥4 times per week	45 (10.7)	1.14 (0.82–1.63)	10 (2.5)	0.93 (0.45–1.93)	6 (1.9)	0.67 (0.25–1.76)
Amount of vigorous activity
0–30 min per week	132 (9.8)	1.00	39 (3.0)	1.00	28 (2.8)	1.00
1–3 h per week	105 (7.4)	0.82 (0.63–1.07)	30 (2.2)	0.79 (0.48–1.30)	24 (2.2)	0.74 (0.42–1.31)
≥4 h per week	47 (9.5)	1.00 (0.71–1.42)	7 (1.5)	0.49 (0.21–1.17)	7 (1.8)	0.66 (0.27–1.61)
Change in vigorous activity from ECRHS II to ECRHS III
Consistently not vigorously active	123 (9.1)	1.00	43 (3.2)	1.00	29 (2.8)	1.00
Becoming vigorously inactive	54 (8.7)	1.00 (0.70–1.43)	11 (1.9)	0.83 (0.34–1.35)	9 (1.9)	0.96 (0.44–2.08)
Becoming vigorously active	41 (9.1)	1.11 (0.80–1.54)	11 (2.4)	0.68 (0.42–1.61)	10 (2.8)	0.83 (0.39–1.78)
Consistently not vigorously active	60 (8.5)	1.01 (0.73–1.41)	11 (1.6)	0.50 (0.24–1.03)	11 (1.9)	0.64 (0.29–1.42)

^#: adjusted for sex, ECRHS II age, smoking status, occupation, education and body mass index.