International Journal of Clinical Preventive Dentistry

Table. 6. Table 6

Changes in Turesky’s plaque index by group and measurement period

Group	N	Base		1 week		2 weeks		4 weeks

Mean	SD	Mean	SD	Mean	SD	Mean	SD
E1	30	2.58	0.38		2.53	0.32		2.55	0.31	2.44	0.27^a
E2	30	2.60	0.36		2.53	0.29		2.47	0.29	2.47	0.30^ab
NC	30	2.55	0.35		2.56	0.28		2.57	0.22	2.67	0.26^b
PC	30	2.58	0.38		2.51	0.29		2.49	0.30	2.45	0.30^a
p-value⁺		.959		.911		.503		.004

SD: standard deviation, E1: experimental group, E2: comparison group, NC: negative control group, PC: positive control group.

⁺p-value by one way ANOVA, ^abSame letter means no statistical difference by Scheffe test.