Table 1.

Basic characteristics of the participants.

Variable	Category	n	Proportion (%)
1. Gender	(1) Male	882	56.98
	(2) Female	666	43.02
2. Grade	(1) Grade 4	189	12.21
	(2) Grade 5	248	16.02
	(3) Grade 6	225	14.53
	(4) Grade7	269	17.38
	(5) Grade 8	321	20.74
	(6) Grade 9	296	19.12
3. School location	(1) City	620	40.05
	(2) Countryside	928	59.95
4. Only children family	(1) Yes	311	20.09
	(2) No	1221	78.88
	(3) Miss	16	1.03