Table 1.

Prevalence of TDIs according to age, sex and type of institution

Variables	No. of children examined	No. and % of children with TDIs	p*
Age
8 years age group	750	45 (6)	<0.001
9 years age group	750	63 (8.4)
10 years age group	750	92 (12.3)
11 years age group	750	143 (19.1)
Sex
Male	1,500	217 (14.5)	<0.001
Female	1,500	126 (8.4)
Type of institution
Government school	1,500	200 (13.3)	<0.001
Private school	1,500	143 (9.5)

^*Chi square test