Table 4.

Percentage reduction in lesion depth

		N	Mean	Std. deviation	95% confidence interval for mean		Minimum	Maximum
					Lower bound	Upper bound
Percent reduction	I Low-fluoridated	12	21.53	1.00	20.90	22.17	19.75	23.50
	II Nonfluoridated	12	5.06	3.75	2.67	7.44	-0.74	10.9
	III Herbal nonfluoridated	12	8.4	0.93	8.25	9.43	7.79	11.07
	pa value		<0.0001, S
	Post hoc pairwise comparisonb		3<1<2