Table 2.
Characteristics of the Subjects
| Boys (n = 4,495) | Girls (n = 4,269) | Total (n = 8,764) | ||
|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | p-value | |
| Age (years) | 8.7 ± 1.4 | 8.6 ± 1.4 | 8.6 ± 1.4 | < 0.0001 |
| Anthropometric measures | ||||
| Height (cm) | 135.4 ± 9.4 | 134.6 ± 9.8 | 135.0 ± 9.6 | < 0.0001 |
| Weight (kg) | 32.5 ± 9.6 | 30.4 ± 8.4 | 31.5 ± 9.1 | < 0.0001 |
| Waist circumference (cm) | 59.3 ± 9.6 | 56.0 ± 7.7 | 57.7 ± 8.9 | < 0.0001 |
| BMI (kg/m2) | 17.4 ± 3.3 | 16.5 ± 2.8 | 17.0 ± 3.1 | < 0.0001 |
| Blood pressure | ||||
| Systolic (mmHg) | 100.9 ± 10.6 | 98.8 ± 10.6 | 99.9 ± 10.7 | < 0.0001 |
| Diastolic (mmHg) | 63.6 ± 8.8 | 63.6 ± 9.2 | 63.6 ± 9.0 | 0.8478 |
| Metabolic profile | ||||
| TG (mmol/L) | 0.80 ± 0.46 | 0.83 ± 0.43 | 0.81 ± 0.45 | < 0.0001 |
| TC (mmol/L) | 4.06 ± 0.76 | 4.11 ± 0.81 | 4.08 ± 0.78 | 0.0042 |
| LDL-C (mmol/L) | 2.08 ± 0.62 | 2.16 ± 0.66 | 2.12 ± 0.64 | < 0.0001 |
| HDL-C (mmol/L) | 1.48 ± 0.31 | 1.45 ± 0.30 | 1.46 ± 0.31 | < 0.0001 |
| Glucose (mmol/L) | 4.57 ± 0.57 | 4.45 ± 0.58 | 4.51 ± 0.58 | < 0.0001 |
| BMI status | ||||
| Normal weight (%) | 74.1 | 82.6 | 78.2 | < 0.0001 |
| Overweight (%) | 13.3 | 9.5 | 11.5 | |
| Obesity (%) | 12.6 | 7.9 | 10.3 | |
Comparison between boys and girls, using generalized linear mixed model for classified variables and mixed linear model for continuous variable by controlling the different schools and classes.