N = 644

Provided Specimen (n=138)

Did Not Provide Specimen (n=506)

p-value

Specimen Group

  Buccal

  Blood

 

30% (78)

16% (60)

 

70% (181)

84% (325)

<0.0001

Age (years)

  4-<18

  18-38

 

23% (113)

15% (25)

 

77% (368)

85% (138)

0.03

Gender

  Male

  Female

 

23% (81)

20% (57)

 

78% (279)

80% (227)

0.46

No.dispensings of inhaled corticosteroids in 1 year

 

 

3

4

5

6

7+

 

 

 

 

18% (30)

22% (35)

18% (18)

23% (15)

27% (40)

 

 

 

 

82% (139)

78% (126)

82% (84)

77% (49)

73% (108)

0.27

Emergency Department Visits

 

0

1

2

3+

 

 

23% (32)

25% (36)

18% (21)

20% (49)

 

 

77% (107)

75% (109)

82% (98)

80% (192)

0.50

Hospitalizations

0

1

2

 

22% (137)

13% (1)

0% (0)

 

78% (498)

88% (7)

100% (1)

0.72

In 208 subjects who completed telephone interview

Race

Caucasian

Black

Asian

Other

 

72% (100)

13% (18)

7% (10)

7% (10)

 

60% (42)

21% (15)

7% (5)

11% (8)

0.37

Asthma Control

 

Good

Poor

 

 

29% (40)

71% (98)

 

 

36% (16)

64% (54)

 

 

0.35

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