|
|
|
|
Yes (n=4,619) |
|
No |
|
|
(n=54,865) |
|
|
|
|
|
|
|
|
|
|
N %
|
|
N %
|
|
N %
|
|
|
Age (years [mean (SD)]) *
|
|
10.23 (3.92)
|
|
9.50 (3.82)
|
|
10.29 (3.92)
|
|
<0.001
|
<5 years
|
|
5647 (0.09)
|
|
480 (0.10)
|
|
5167 (0.09)
|
|
|
5-10 years
|
|
18171 (0.31)
|
|
1778 (0.38)
|
|
16393 (0.30)
|
|
|
10-15 years
|
|
28000 (0.47)
|
|
1954 (0.42)
|
|
26046 (0.47)
|
|
|
≥15 years
|
|
7666 (0.13)
|
|
407 (0.08)
|
|
7259 (0.13)
|
|
|
BMI (kg/m2 [mean (SD)]) *
|
|
18.57 (4.47)
|
|
18.71 (4.63)
|
|
18.56 (4.46)
|
|
0.037
|
Exercise time per week (hours [mean (SD)]) *
|
|
6.56 (7.96)
|
|
6.15 (7.64)
|
|
6.59 (8.00)
|
|
<0.001
|
Gender *
|
|
|
|
|
|
|
|
<0.001 |
Boys
|
|
30,105 (50.61)
|
|
2,845 (61.59)
|
|
27,260 (49.69)
|
|
|
Girls
|
|
29,379 (49.39)
|
|
1,774 (38.41)
|
|
27,605 (50.31)
|
|
|
Asthma family history *
|
|
|
|
|
|
|
|
<0.001 |
No family member affected
|
|
55641 (93.54)
|
|
3948 (85.47)
|
|
51693 (94.22)
|
|
|
1 family member affected
|
|
3529 (5.93)
|
|
585 (12.67)
|
|
2944 (5.37)
|
|
|
2 family members affected
|
|
279 (0.47)
|
|
73 (1.58)
|
|
206 (0.38)
|
|
|
≥ 3 family members affected
|
|
35 (0.06)
|
|
13 (0.28)
|
|
22 (0.04)
|
|
|