Table 1: Characteristics of the cases and controls.

Controls
Cases
P value

Personal characteristics
 Female (%) 60.6 35.6 <0.001
 Parents with > high school (%) 39.4 37.9 0.81
 With allergic disease (%) 33.2 73.6 <0.001
 Family history of asthma (%) 7.2 23.0 <0.001
 Maternal smoking during pregnancy (%) 9.1 20.7 0.006
 Early respiratory illness (%) 8.7 18.4 0.02
 High tobacco smoke exposure (%) 51.0 49.4 0.81
 Age, years (mean, SD)11.5 (3.2)11.1 (2.9) 0.31
Weight status
 Actual overweight based on BMI (%) 29.8 33.3 0.55
 Perceived overweight (%) 7.8 9.9 0.58
Activity levels
 Higher activity level (%) 77.4 79.3 0.72
Dietary intake
 Regular fast food and/or soft drink consumption (%) 54.3 65.5 0.08
 Regular seafood consumption (%) 26.4 25.3 0.84
 Regular vegetable consumption (%) 99.0 98.9 0.88
 Regular fruit consumption (%) 99.5 98.9 0.52
 Regular milk consumption (%) 95.2 96.6 0.60