Table 1. Summary table of multi-way ANOVA for the bactericidal activity.

	df	Sum of squares	Mean square	F value	P value
H2O2	3	4.32	1.44	9.6204	<0.0001
LD	2	0.52	0.26	1.7369	0.1805
US	1	0.04	0.04	0.266	0.607
H2O2×LD	6	24.41	4.07	27.1915	<0.0001
H2O2×US	3	0.58	0.19	1.2976	0.2785
LD×US	2	0.02	0.01	0.0538	0.9476
H2O2×LD×US	6	3.4	0.57	3.7903	0.0017
Error	120	17.96	0.15

(LD: laser, US: ultrasound, df: degree of freedom)