Table 6.

Statistical analysis (U-test, p = 0.05 with Bonferroni correction, p = 0.0125) of test series with respect to remaining chitosan coating on PMMA.

3,000 cycles of abrasion
Test series	U	p	Bonferroni-corrected significance
I versus II	41.0	0.52052	–
II versus III	16.0	0.01133	*
II versus IV	39.0	0.42736	–
IV versus V	19.0	0.02114	–
IV versus VI	9.0	0.00220	*
IV versus VII	10.0	0.00283	*
V versus VII	37.0	0.34471	–
VI versus VII	48.5	0.93974	–
VI versus III	29.0	0.12123	–
30,000 cycles of abrasion
Test series	U	p	Bonferroni-corrected significance
I versus II	22.0	0.03764	–
II versus III	4.0	0.00058	*
II versus IV	13.0	0.00580	*
IV versus V	0.0	0.00018	*
IV versus VI	0.0	0.00018	*
IV versus VII	2.0	0.00033	*
V versus VII	25.0	0.06402	–
VI versus VII	14.0	0.00729	*
VI versus III	36.0	0.30749	–

*statistically significant with Bonferroni correction