Table 1. Subject characteristics.

Characteristic		Infantile wheezer (n = 28)	B-asthma (n = 29)	p value
Age (yr)		1.6 (1–2)	6.5 (3–15)	< 0.01
Sex, male:female		18:10	14:15	NS
Additional history
	Food allergy	2 (7.1)	2 (6.9)	NS
	Atopic dermatitis	2 (7.1)	3 (10.3)	NS
	Allergic rhinitis	1 (3.5)	12 (41.4)	< 0.001
Virus-PCR*
	Positive	18 (65.8)	12 (37.9)	< 0.001
	Coinfection	12/18 (66.7)	2/12 (16.7)	< 0.0001

Values are presented as median (range) or number (%).

PCR, polymerase chain reaction; NS, not significant.

^*Virus-PCR positive at presentation.