. 2017 Feb 6;87(4):534–541. doi: 10.2319/090216-666.1

Table 3.

Significance Levels Calculated for Forces and Moments of PET-G Aligner With Different Material Thicknesses Using SPSS 23^a

Edge Width, mm	Thickness Comparison	Palatal Tipping			Intrusion
Edge Width, mm	Thickness Comparison	F_x	F_z	M_y	F_z	M_y
	Overall^b	0.011*	0.361	0.020*	0.054	0.263
	0.5 mm vs 0.625 mm^c	0.307		0.413
	0.625 mm vs 0.75 mm^c	0.516		0.574
	0.5 mm vs 0.75 mm^c	0.008*		0.016*
0–1	Overall^b	0.039*	0.587	0.066	0.027*	0.051
	0.5 mm vs 0.625 mm^c	0.890			0.539
	0.625 mm vs 0.75 mm^c	0.408			0.539
	0.5 mm vs 0.75 mm^c	0.034*			0.022*
3–4	Overall^b	0.039*	0.288	0.148	0.061	0.561
	0.5 mm vs 0.625 mm^c	0.408
	0.625 mm vs 0.75 mm^c	0.890
	0.5 mm vs 0.75 mm^c	0.034*
6–7	Overall^b	0.051	0.039*	0.039*	0.039*	0.430
	0.5 mm vs 0.625 mm^c		0.408	0.408	0.408
	0.625 mm vs 0.75 mm^c		0.890	0.890	0.890
	0.5 mm vs 0.75 mm^c		0.034*	0.034*	0.034*

Significant values are labeled as follows: * P ≤ .05; ** P ≤ .01; *** P ≤ .001 (N = 9).

Kruskal-Wallis statistical test.

Post-hoc pairwise comparison after Kruskal-Wallis as implemented in the IBM SPSS ModelViewer. IBM SPSS 23 ModelViewer performed post-hoc pairwise comparisons only if the Kruskal-Wallis test showed a significant result for that variable.