Table 5. Risk factors for “asthma-related symptoms”, “current asthma” and any wheeze by multiple logistic regression analysis, in 1990 and 2008 respectively.

		“Asthma-related symptoms”		“Current asthma”		Any wheeze
		1990 OR (95% CI)	2008 OR (95% CI)	1990 OR (95% CI)	2008 OR (95% CI)	1990 OR (95% CI)	2008 OR (95% CI)
Female sex		0.98 (0.83–1.15)	1.08 (0.91–1.28)	1.15 (0.96–1.39)	1.22 (1.04–1.44)	1.08 (0.97–1.21)	1.09 (0.96–1.22)
Age (vs. 20–24 yrs)
	25–29 yrs	0.91 (0.71–1.16)	0.95 (0.74–1.21)	0.80 (0.61–1.04)	0.91 (0.73–1.15)	1.00 (0.85–1.18)	0.98 (0.82–1.16)
	30–34 yrs	0.85 (0.66–1.09)	0.90 (0.70–1.16)	0.65 (0.49–0.87)	0.83 (0.65–1.06)	0.99 (0.84–1.16)	0.90 (0.75–1.08)
	35–39 yrs	0.85 (0.66–1.09)	1.05 (0.81–1.35)	0.77 (0.58–1.01)	0.93 (0.73–1.19)	0.98 (0.83–1.16)	1.07 (0.89–1.28)
	40–44 yrs	1.11 (0.86–1.43)	0.82 (0.62–1.09)	0.75 (0.56–1.01)	0.77 (0.59–1.01)	1.08 (0.91–1.29)	1.06 (0.87–1.28)
Centre (vs. Uppsala)
	Umeå	1.23 (1.01–1.50)	1.17 (0.95–1.44)	1.29 (1.04–1.60)	1.21 (0.99–1.48)	1.14 (1.00–1.30)	1.16 (0.995–1.35)
	Gothenburg	1.03 (0.84–1.27)	0.81 (0.66–0.998)	0.96 (0.76–1.22)	0.82 (0.67–0.996)	1.18 (1.03–1.35)	0.95 (0.82–1.09)
Rhinitis		4.44 (3.76–5.24)	5.05 (4.25–6.00)	10.2 (8.45–12.4)	8.06 (6.77–9.60)	3.30 (2.94–3.71)	4.06 (3.61–4.56)
Smoking (vs. never)
	Ever	0.98 (0.74–1.29)	1.21 (0.96–1.54)	1.18 (0.90–1.56)	1.00 (0.79–1.26)	1.17 (0.98–1.40)	1.16 (0.98–1.40)
	Current	2.14 (1.79–2.55)	1.92 (1.53–2.40)	1.05 (0.85–1.29)	1.21 (0.95–1.54)	2.84 (2.52–3.20)	2.43 (2.08–2.85)

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.