Table 2.

Comparison between plaque index means

	Jordan Power (n = 15)	Panbehriz Classic (n = 15)	Oral-B Advantage (n = 15)	Total (N = 45)
Baseline PI (mean ± SD)	43.46 ± 17.20	49.14 ± 21.92	51.61 ± 20.86	49.74 ± 20.37
Week 1 PI (mean ± SD)	13.46 ± 10.41	20.92 ± 14.17	15.00 ± 11.34	16.46 ± 12.24
Week 2 PI (mean ± SD)	5.44 ± 2.01	9.91 ± 5.31	8.46 ± 6.31	7.94 ± 5.16
95% CI for diff. week 1–week 2	(2.24, 13.81)	(3.49, 18.53)	(−0.43, 13.50)	(4.88, 12.17)
Paired t-value*	2.98	3.14	2.01	4.71
P-value	0.010*	0.07*	0.64 NS	<0.001*

SD, standard deviation; NS, non-significant; PI, plaque index.

^*Paired t-test for comparison between means at week 1 and week 2 for each group separately.