Table 2.

Demographic, asthma control, and health utilization variables stratified by subjects who provided specimens versus subjects who did not provide specimens for genetic analyses.^*

N = 644	Provided Specimen(n=138)	Did Not Provide Specimen (n=506)	p-value
Specimen Group			<0.0001
Buccal	30% (78)	70% (181)
Blood	16% (60)	84% (325)
Age (years)			0.03
4–<18	23% (113)	77% (368)
18–38	15% (25)	85% (138)
Gender			0.46
Male	23% (81)	78% (279)
Female	20% (57)	80% (227)
No. dispensings of inhaled corticosteroids in 1 year			0.27
3	18% (30)	82% (139)
4	22% (35)	78% (126)
5	18% (18)	82% (84)
6	23% (15)	77% (49)
7+	27% (40)	73% (108)
Emergency Department Visits			0.50
0	23% (32)	77% (107)
1	25% (36)	75% (109)
2	18% (21)	82% (98)
3+	20% (49)	80% (192)
Hospitalizations			0.72
0	22% (137)	78% (498)
1	13% (1)	88% (7)
2	0% (0)	100% (1)
In 208 subjects who completed telephone interview
Race			0.37
Caucasian	72% (100)	60% (42)
Black	13% (18)	21% (15)
Asian	7% (10)	7% (5)
Other	7% (10)	11% (8)
Asthma Control
Good	29% (40)	36% (16)	0.35
Poor	71% (98)	64% (54)

^*Note: Row percentages are provided rather than column percentages.