Table 1.
Characteristics by gender1
| Boys n=235 | Girls n=217 | p2 | ||
|---|---|---|---|---|
| General characteristics | ||||
| Age (years) | 13.6 ± 2.4 | 13.6 ± 2.6 | 0.87 | |
| Tanner stage | 1 | 19 % (45) | 18 % (39) | }0.10 |
| 2 | 20 % (47) | 12 % (26) | ||
| 3 | 19 % (45) | 21 % (45) | ||
| 4 | 28 % (65) | 28 % (62) | ||
| 5 | 14 % (33) | 21 % (45) | ||
| Weight (kg) | 49 ± 15 | 47 ± 13 | 0.0002 | |
| Height (cm) | 161 ± 15 | 156 ± 12 | <0.0001 | |
| Adiposity parameters | ||||
| BMI (kg/m2) | 18.3 ×/÷ 1.17 | 18.8 ×/÷ 1.17 | 0.24 | |
| Sum of the 4 mean skinfolds (mm) | 33.2 ×/÷ 1.61 | 45.5 ×/÷ 1.53 | <0.0001 | |
| Waist circumference (cm) | 67.7 ± 8.8 | 65.2 ± 7.6 | <0.0001 | |
| Waist-to-height ratio | 0.42 ± 0.04 | 0.42 ± 0.04 | 0.36 | |
| F3-Normal | 91 % (214) | 92 % (199) | 0.79 | |
| F-Overweight | 9 % (21) | 8 % (18) | ||
| IOTF4-Normal | 90 % (212) | 89 % (193) | 0.68 | |
| IOTF-Overweight | 8 % (20) | 9 % (19) | ||
| IOTF-Obese | 1 % (3) | 2 % (5) | ||
| Cardiovascular and metabolic risk factors | ||||
| Total cholesterol (mmol/L) | 4.05 ×/÷ 1.19 | 4.30 ×/÷ 1.20 | <0.0001 | |
| LDL cholesterol (mmol/L) | 2.16 ×/÷ 1.31 | 2.36 ×/÷ 1.32 | <0.0001 | |
| HDL cholesterol (mmol/L) | 1.55 ± 0.34 | 1.55 ± 0.34 | 0.55 | |
| Triglycerides (mmol/L) | 0.662 ×/÷ 1.50 | 0.735 ×/÷ 1.45 | 0.003 | |
| Glucose (mmol/L) | 4.76 ×/÷ 1.08 | 4.65 ×/÷ 1.09 | 0.001 | |
| Insulin (pmol/L) | 33.1 ×/÷ 1.78 | 39.3 ×/÷ 1.78 | 0.002 | |
| Systolic blood pressure (mmHg) | 110.1 ± 12.0 | 105.0 ± 11.1 | <0.0001 | |
| Diastolic blood pressure (mmHg) | 61.8 ± 9.0 | 62.3 ± 8.6 | 0.79 | |
| High blood pressure | 5.5 % (13) | 3.2 % (7) | 0.25 | |
1
Mean ± standard deviation or geometric mean ×/÷ geometric standard deviation or percentage (number)
2
Student t-test for gender comparisons of quantitative variables or Chi-square test for gender comparisons of qualitative variables
3
F-Overweight defined as = 97th percentile of the French BMI reference curves
4
Overweight and obesity defined by IOTF cutoff