Table 3. Mean changes in plaque index (PI) and mean sulcus bleeding index (SBI) over a 9-month period in the groups .

Parameter	1.2% ATV	1.2% SMV	Placebo		P-value
Mean PI change	0.96 ± 0.40	0.99 ± 0.36	0.98 ± 0.34	Placebo vs 1.2% ATV	0.768
				Placebo vs 1.2% SMV	0.948
				1.2% ATV vs 1.2% SMV	0.936
Mean mSBI change	1.54 ± 0.35	1.40 ± 0.43	0.93 ± 0.44	Placebo vs 1.2% ATV	<0.001*
				Placebo vs 1.2% SMV	<0.001*
				1.2% ATV vs 1.2% SMV	0.647

^*Statistically significant at P<0.05