Table 2.

One-way ANOVA with post hoc Tukey test for comparison of roughness.

Variable	Comparison of	Comparison with	Mean difference	Std. error	P value
Roughness	Group A	Group B	−124.6	4.4	<0.001
		Group C	−75.06	4.4	<0.001
		Group D	−155.6	4.4	<0.001
		Group E	−18.5	4.4	0.004
	Group B	Group C	49.53	4.4	<0.001
		Group D	−30.42	4.4	<0.001
		Group E	106.08	4.4	<0.001
	Group C	Group D	−79.95	4.4	<0.001
		Group E	56.54	4.4	<0.001
	Group D	Group E	136.5	4.4	<0.001