TABLE 2: Distribution of sample according to age group, grades and percentage of fluorosis

Age group		No. of children			Grade 1					Grade 2					Grade 3					Grade 4					Grade 5
					No.		%			No.		%			No.		%			No.		%			No.		%
Group I		52			18		34.6			27		52			5		9.6			1		1.9			1		1.9
Group II		58			17		29.3			31		53			8		13.7			2		3.4			0		0
Group III		65			20		31.2			25		39			16		25			4		6			0		0
Group IV		44			13		29.5			20		45.4			8		18.1			3		6.8			0		0
Group V		129			23		18			75		58.1			26		20.1			5		3.8			0		0
Group VI		103			22		21.3			49		47.5			27		26.2			5		4.8			0		0
Total		451			113		25			227		50			90		20			20		4.5			1		0.2