Table 1.

Demographic characteristics of the included primary school children, Al Hassa, Saudi Arabia (N=2002)

Characteristics	Number	%
Gender
Male	966	48.3
Female	1036	51.7
Residence
Rural	561	28.0
Urban	1441	72.0
Age groups (years)
6-<9	870	43.5
9-<12	897	44.8
12-14	235	11.7
Mean Age	9.48±2.31
School grades
1	277	13.8
2	359	17.9
3	399	19.9
4	353	17.6
5	360	18.1
6	254	12.7
Children using spectacles	21	1.0
Spectacles among siblings	20	1.0