Table I.

Characteristics of adolescent and young adults with WBS

	Cases	Controls
N	16	22
Age (range)	20 * (15-27)	27.6 (20-35)
Sex (% male)	56.3	63.6
Race (% white)	93.8	100
BMI (range)	23.1 (16.2-41.6)	25.9 (17.3-40.3)
Smoking (% ever)	0	0
Passive exposure to cigarette smoke	12.5	13.6
FEV1 % predicted	101.3 (18.4) §	92.2 (7.6)
Shortness of breath †	50 *	4.5
Wheezing causing shortness of breath	31.3	18.2
Required medication for wheezing	31.3	18.2
Cough	43.8	22.7

Data presented as mean (SD) or percent unless otherwise indicated

^*p-value <0.05 when compared to controls,

^§N=12 for FEV₁ analysis

^†

Defined as an affirmative answer to any of the following:

1. Ever bothered by shortness of breath
2. Shortness of breath walking up a hill
3. Shortness of breath walking on the level
4. Shortness of breath walking < 100 yards
5. Shortness of breath with dressing or undressing