In Vitro Antimicrobial Activity of Ethanolic Extract of Polish Propolis against Biofilm Forming Staphylococcus epidermidis Strains

Table 4

Multivariate analysis of variance by three-way ANOVA of S. epidermidis strains biofilm formation ability in the presence of EEPP.

Source of variation	df	Sum of squares	Mean squares	% of variance	𝐹	𝑃
Strain (𝑆)	10	22.08	2.21	0.77	0.71	0.719
Time (𝑇)	3	100.31	33.44	3.52	10.70	<0.001
Concentration (𝐶)	10	37.97	3.80	1.33	1.22	0.278
𝑆×𝑇	30	35.33	1.18	1.24	0.38	0.999
𝑆×𝐶	100	234.8	2.35	8.23	0.76	0.96
𝑇×𝐶	30	145.96	4.87	5.12	1.56	0.032
𝑆×𝑇×𝐶	300	764.08	2.55	26.78	0.82	0.974