Table E3.

Viral risk factors for the time to initiation of asthma control medication among children with bronchiolitis defined by strict criteria

Viral risk factor	No. of children in analyses∗	No. of children who have started medication	Unadjusted analysis			Multivariable analysis†
			HR	95% CI	P value	aHR	95% CI	P value
RSV	111/110	24 (22%)	1			1
RV	19	12 (63%)	5.34	2.66-10.72	<.001	4.29	2.01-9.16	<.001
Non-RSV/-RV	39	16 (41%)	2.35	1.25-4.42	.008	3.19	1.58-6.41	.001
RSV	111/110	24 (22%)	1			1
RV-A	2	1 (50%)	2.78	0.38-20.60	.32	1.67	0.21-12.99	.63
RV-C	17	11 (65%)	5.83	2.84-11.95	<.001	5.13	2.31-11.41	<.001
Non-RSV/-RV	39	16 (41%)	2.35	1.25-4.42	.008	3.26	1.62-6.57	.001

CI, Confidence interval.

HRs and 95% CI are from Cox regression.

Bold indicates statistical significance (P < .05).

^∗Numbers apply to both analyses, unless 2 figures are presented, whereupon they apply to unadjusted and multivariable analysis, respectively.

^†Analyses are adjusted for history of atopic dermatitis, siblings, use of systemic corticosteroids, and study center.