Table 1.

Demographic features of the participants

		n	%
Gender	Male	1522	53.8
	Female	1307	46.2
Class	9	1066	37.7
	10	1147	40.5
	11	616	21.8
BB Participation	Yes	558	24.1
	No	1753	75.9
Intention to participate in BB	Yes	485	30.0
	No	1130	70.0

BB: Blood brotherhood