Table 3: Comparison of OHI-S scores, caries treatment needs, and overall knowledge scores between III- and V-grade schoolchildren based on caries status

III grade vs V grade
		Subgroup a		Subgroup b		Subgroup c
OHI-S3
School I		0.011		0.595		0.197
School II		0.361		0.883		0.647
School III		<0.001		0.002		0.188
Caries treatment needsa
School I		0.41		0.49		0.61
School II		0.41		0.048		0.01
School III		0.04		0.91		0.67
Overall knowledgea
School I		0.15		0.65		0.12
School II		0.01		0.06		0.15
School III		0.02		0.39		0.63

^ap-values calculated using chi-square test have been tabulated