Table 3.

IQ score Distribution for Children Living in Areas with Normal, Medium and High Water Fluoride Content

Group IQ	Normal		Medium		High		Total
	N	%	N	%	N	%	N	%
Superior Intelligence	4	4.4	0	0	0	0	4	1.4
Above Average Intelligence	17	18.7	6	5.7	2	2.1	25	8.5
Normal or Average Intelligence	47	51.6	58	54.7	61	63.5	166	56.7
Dullness and Lower IQ	23	25.3	42	39.6	33	34.4	98	33.5
Total	91	100	106	100	96	100	293	100