Table 3.

Risk factors, including study year, for chronic productive cough, recurrent wheeze, dyspnoea grade II, and use of asthma medication by multiple logistic regression analysis

	Chronic productive cough		Recurrent wheeze		Wheeze triad		Dyspnoea grade II		Use of asthma medicines
	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P
Study year 2006 (vs. 1996)	0.83 (0.71–0.97)	0.019	0.91 (0.75–1.10)	0.307	0.97 (0.81–1.17)	0.751	0.84 (0.72–0.97)	0.015	1.44 (1.21–1.72)	<0.001
Male sex	1.13 (0.99–1.30)	0.073	1.23 (1.04–1.46)	0.019	1.02 (0.86–1.21)	0.808	0.58 (0.51–0.67)	<0.001	0.72 (0.60–0.86)	<0.001
Age (vs. <40 years)
40–59.9 years	1.60 (1.37–1.87)	<0.001	1.79 (1.47–2.17)	<0.001	1.14 (0.95–1.37)	0.169	2.74 (2.33–3.21)	<0.001	1.15 (0.94–1.40)	0.169
≥60 years	3.01 (2.48–3.66)	<0.001	3.12 (2.44–3.97)	<0.001	1.53 (1.20–1.96)	0.001	6.24 (5.17–7.53)	<0.001	2.06 (1.62–2.61)	<0.001
Smoking (vs. never)
Former	1.41 (1.17–1.72)	<0.001	1.74 (1.35–2.23)	<0.001	1.63 (1.29–2.05)	<0.001	1.86 (1.57–2.20)	<0.001	1.42 (1.12–1.77)	0.002
Current	2.98 (2.55–3.48)	<0.001	4.15 (3.39–5.08)	<0.001	2.45 (2.02–2.96)	<0.001	2.41 (2.07–2.80)	<0.001	1.15 (0.94–1.41)	0.179
Allergic rhinoconjunctivitis	2.41 (2.10–2.77)	<0.001	3.10 (2.61–3.69)	<0.001	4.57 (3.81–5.47)	<0.001	2.17 (1.90–2.47)	<0.001	5.65 (4.65–6.87)	<0.001

All variables in the table were included in the model. Associations are presented as odds ratios (OR) with 95% confidence intervals (95% CI). Statistically significant associations in bold text.