Table 3.

Relationship between previous episode of bronchiolitis (PEB) and selected demographic characteristics, atopic and non-atopic factors^*.

	Univariate analysis		Multivariate analysis
Characteristic	OR	95% CI	OR	95% CI
Age
0–3 months	1		1
4–12 months	10.06	5.60–18.08	9.20	4.92–17.20
>12 months	24.61	13.00–46.56	18.38	9.24–36.58
Sex
Female	1		1
Male	1.60	1.15–2.22	1.67	1.12–2.49
PMH of asthma
No	1		1
Yes	16.38	7.02–38.18	8.96	3.65–22.0
PMH of atopic dermatitis
No	1		1
Yes	1.55	1.00–2.40	0.79	0.47–1.34
PMH of allergic rhinitis
No	1		1
Yes	5.55	3.05–10.09	3.67	1.81–7.43
Maternal asthma during pregnancy
No	1		1
Yes	2.55	1.51–4.29	1.67	0.89–3.14
Daycare attendance
No	1		1
Yes	1.59	1.11–2.26	1.10	0.72–1.68
Cigarette exposure
No	1		1
Yes	2.07	1.24–3.46	2.37	1.26–4.43

OR=Odds ratio; PMH=Past medical history.

^*All other variables excluded from the model were not significantly associated with PEB in the univariable analysis (p>0.05).