Table 1.

Study participants according to school grade

	Boys		Girls		Total
Grade	N	%	N	%	N
1	19	59	13	41	32
2	23	44	29	56	52
3	23	45	28	55	51
4	30	67	15	33	45
5	24	59	17	41	41
6	32	76	10	24	42
7	22	48	24	52	46
8	21	57	16	43	37
9	11	39	17	61	28
10	25	56	20	44	45
Total	230	55	189	45	419