From: A pilot study with early adolescents: dealing with diet, tobacco and air pollution using practical experiences and biological markers
No.
Percent
Sex
Female
188
67.9
Male
89
32.1
Age (years)
≤ 15
250
90.3
≥ 16
27
9.7
School type
Humanities
97
35.0
Sciences
69
24.9
Didactics and education
111
40.1