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Demographic characteristics of study participants (students)
| Age (years) | Mean (SD) | 14.09 (3.11) |
| Median | 14.0 | |
| Gender - (n%) | Male | 1525 (44.04%) |
| Female | 1937 (55.93%) | |
| Weight (kg) | Mean (SD) | 45.8 (13.07) |
| Median | 47.4 | |
| Height (cm) | Mean (SD) | 152.3 (14.37) |
| Median | 155.1 |
