Evaluation of High-Performance Polyether Ether Ketone Polymer Treated with Piranha Solution and Epigallocatechin-3-Gallate Coating

Table 4

Tukey’s test of multiple comparisons for different groups of roughness test results.

Tukey’s HSD test
Group pairs	Difference	Standard error	score	value	Sig.
C vs. P	143.5209	6.347442	22.61082	< 0.00001	S
C vs. E	84.0769	6.347442	13.24579	< 0.00001	S
C vs. PE	99.6469	6.347442	15.69875	< 0.00001	S
P vs. E	59.444	6.347442	9.365032	< 0.00001	S
P vs. PE	43.874	6.347442	6.912076	0.00012	S
E vs. PE	15.57	6.347442	2.452957	0.32128	NS