Table 1 Characteristics of subjects
Fourth graders (age 9-10 years) | Seventh graders (age 12-13 years) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Boys | Girls | P - value* | Boys | Girls | P - value* | |||||
(n = 1,645) | (n = 1,523) | (n = 1,380) | (n = 1,321) | |||||||
Age (years) | 9.0 | (9.4) | 9.0 | (9.4) | 0.751 | 12.0 | (12.3) | 12.0 | (12.3) | 0.277 |
Height (cm) | 134.9 | 134.7 | 0.787 | 155.1 | 153.0 | < 0.001 | ||||
Weight (kg) | 30.2 | 29.5 | < 0.001 | 43.8 | 43.3 | 0.065 | ||||
BMI (kg/m2) | 16.6 | 16.3 | < 0.001 | 18.1 | 18.3 | 0.036 | ||||
LDL-C (mg/dL) | 90.0 | (92.9) | 95.0 | (97.3) | < 0.001 | 86.0 | (88.9) | 93.0 | (95.0) | < 0.001 |
< 110 (%) | 81.2 | 75.1 | 0.002 | 84.5 | 79.3 | < 0.001 | ||||
110 - 139 (%) | 15.2 | 21.6 | 12.8 | 17.3 | ||||||
140 + (%) | 3.6 | 3.3 | 2.8 | 3.3 | ||||||
Family history of hypercholesterolemia (%) | ||||||||||
No | 94.0 | 94.8 | 0.193 | 94.2 | 94.3 | 0.480 | ||||
Yes | 6.0 | 5.2 | 5.8 | 5.7 | ||||||
Exercise (%) | ||||||||||
Daily | 63.1 | 42.0 | < 0.001 | 84.1 | 59.3 | < 0.001 | ||||
Sometimes | 23.4 | 31.7 | 7.4 | 13.1 | ||||||
None | 13.5 | 26.2 | 8.6 | 27.7 | ||||||