Table 4: Statistical comparison (by unpaired t- test) of S. mutans (in cfu/ml) of mean change at various levels between groups I and III

Groups		Levels
		1st day morning		1st day evening		4th day evening		7th day morning		7th day evening
Group I		137.50 ± 53.70		140.25 ± 49.27		140.25 ± 49.27		140.25 ± 49.27		140.25 ± 49.27
Group III		0.00 ± 0.00		62.50 ± 37.73		95.00 ± 36.89		121.00 ± 43.38		130.00 ± 42.16
p-value		< 0.001		< 0.001		< 0.001		< 0.001		> 0.05
Significance		HS		HS		HS		HS		NS

HS - highly significant, NS - not significant