Table 1.

Distribution of the percentage of output shades according to veneer thickness. The table shows the results of the Kruskal–Wallis test for multiple comparisons of non-parametric data. 1: N = 125 samples (25 samples per veneer thickness*5 background shades) IQR: Interquartile range.

Output Shades	Veneer Thickness = 0.5 mm	Veneer Thickness = 0.75 mm	Veneer Thickness = 1.00 mm	p-Value
A1, median (IQR)	30.00 (25.00, 41.00)	59.00 (47.00, 69.00)	22.00 (17.00, 28.00)	<0.001
A2, median (IQR)	0.00 (0.00, 0.00)	0.00 (0.00, 6.00)	10.00 (8.00, 12.00)	<0.001
B1, median (IQR)	57.00 (48.00, 64.00)	6.00 (4.00, 8.00)	0.00 (0.00, 2.00)	<0.001
B2, median (IQR)	8.00 (6.00, 12.00)	28.00 (21.00, 40.00)	66.00 (61.00, 70.00)	<0.001
B3, median (IQR)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.002
B4, median (IQR)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	<0.001
C1, median (IQR)	0.00 (0.00, 4.00)	0.00 (0.00, 3.00)	0.00 (0.00, 0.00)	0.028