Table 2.
Baseline anthropometric characteristics among measured adolescents (N = 8, 735).a
| Measured adolescents |
Boys |
Girls |
P* | Vocational high school |
General high school |
Middle school |
P** | |
|---|---|---|---|---|---|---|---|---|
| N = 8735 |
4318 (49.4%) |
4417 (50.6%) |
2186 (25.0%) |
5302 (60.7%) |
1247 (14.3%) |
|||
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |||
| Body mass index (kg/m2) | 21.09 (3.79) | 20.86 (3.76) | 21.33 (3.80) | <0.0001 | 22.04 (4.41) | 20.82 (3.43) | 20.61 (3.82) | <0.0001 |
| BMI Z-score | 0.13 (1.11) | 0.10 (1.16) | 0.15 (1.07) | 0.04 | 0.31 (1.21) | 0.05 (1.05) | 0.13 (1.16) | <0.0001 |
| Weight status (IOTF classification)b, (%) | 0.29 | <0.0001 | ||||||
| Thin | 8.3 | 7.7 | 9.1 | 7.4 | 8.5 | 9.9 | ||
| Normal | 73.2 | 74.0 | 72.5 | 67.3 | 76.4 | 70.1 | ||
| Overweight | 13.9 | 13.8 | 14.0 | 17.8 | 11.8 | 15.6 | ||
| Obese | 4.5 | 4.5 | 4.5 | 7.5 | 3.3 | 4.3 | ||
| Waist circumference (cm) | 74.74 (10.6) | 75.28 (10.88) | 74.20 (10.29) | <0.0001 | 77.66 (12.18) | 74.48 (9.69) | 71.55 (9.70) | <0.0001 |
| High waist circumference (McCarthy classification), (%) | <0.0001 | <0.0001 | ||||||
| Yes | 28.8 | 20.2 | 37.5 | 38.1 | 26.5 | 22.9 | ||
| Waist-to-Height ratio (WHtR)c | 0.45 (0.06) | 0.44 (0.06) | 0.46 (0.06) | <0.0001 | 0.47 (0.07) | 0.45 (0.06) | 0.44 (0.06) | <0.0001 |
| High WHtR (>0.5), (%) | <0.0001 | <0.0001 | ||||||
| Yes | 12.5 | 10.3 | 14.7 | 19.9 | 9.4 | 12.7 | ||
P-value of chi-square (for categorical variables) or t-test (continuous variables) comparison between boys and girls (*) and school type (**).
a
Adolescents attending grads 9 or 10 who were measured (weight, height and waist circumference) during inclusion process.
b
International Obesity Task Force.
c
WHtR = waist circumference/height.