Table 2.

 Multiple logistic analysis derived odds ratios (OR) and 95% confidence intervals (95% CI) for hospitalization by demographic and clinical characteristics.

Variables	Category or increment	OR	95% CI		p‐value
Age	<12 months	4.51	2.60	7.81	0.0001
	12–59	1.45	0.92	2.30	0.11
	60+	Baseline
Sex	Female	1.00	0.70	1.44	0.99
	Male	Baseline
Family member with ARTI	Yes	1.03	0.72	1.49	0.86
	No	Baseline
Chronic health problem	Yes	3.48	1.61	7.52	0.002
	No	Baseline
No. of wheezing episodes per year	Two more	1.33	1.08	1.64	0.01
Fever on presentation	Yes	2.70	1.80	4.07	0.0001
	No	Baseline
Bronchodilator use on presentation	Yes	4.50	2.45	8.24	0.0001
	No	Baseline
Antibiotic use on presentation	Yes	0.93	0.60	1.45	0.75
	No	Baseline
Influenza vaccination	Yes	1.83	0.99	3.36	0.06
	No	Baseline
Pneumococcal vaccination	Yes	0.52	0.33	0.81	0.004
	No	Baseline
Additionally introduced variable, available for 566 children
Viral co‐infection	Yes	1.52	1.01	2.29	0.04
	No	Baseline

ARTI, acute respiratory tract infection; Chronic health problem, chronic heart, liver, or kidney disease, cystic fibrosis or diabetes; Pneumococcal vaccination, at least one dose.