Table 2.

Demographic data of the surveyed children

		Total (%)	Female (%)	Male (%)
Gender	–	99.4 (n = 314)	48.1 (n = 152)	51.3 (n = 162)
–	No response	0.6 (n = 2)a	–	–
Age (years)	6–9	21.0 (n = 67)a	48.5 (n = 32)	51.5 (n = 34)
	10–15	76.1 (n = 240)a	46.9 (n = 112)	53.1 (n = 127)
	15+ (= 15–18)	2.9 (n = 9)	88.9 (n = 8)	11.1 (n = 1)
Education	Primary school	24.8 (n = 78)	46.2 (n = 36)	53.8 (n = 42)
	Middle school	72.3 (n = 228)a	48.0 (n = 109)	52.0 (n = 118)
	Grammar school	2.9 (n = 9)	77.8 (n = 7)	22.2 (n = 2)
	No response	0.3 (n = 1)	–	–

^an = 2 children did not state their gender, one of them was 6–9 years old, the other indicated to attend the middle school and was 10–15 years old