Table 2.

Distribution of the % of output shades according to background shade. The table shows the results of the Kruskal–Wallis test for multiple comparisons of non-parametric data.

Output Shades	A1	A2	A3	A3.5	A4	p-Value
A1, median (IQR)	45.00 (30.00, 66.00)	30.00 (18.00, 44.00)	33.00 (18.00, 50.00)	30.00 (23.00, 41.00)	28.00 (20.00, 50.00)	<0.001
A2, median (IQR)	0.00 (0.00, 6.00)	7.00 (0.00, 10.00)	5.00 (0.00, 10.00)	0.00 (0.00, 8.00)	0.00 (0.00, 10.00)	0.010
B1, median (IQR)	7.00 (0.00, 44.00)	6.00 (0.00, 54.00)	3.00 (0.00, 41.00)	5.00 (2.00, 56.00)	10.00 (3.00, 63.00)	0.013
B2, median (IQR)	22.00 (9.00, 58.00)	34.00 (7.00, 63.00)	39.00 (11.00, 70.00)	31.00 (13.00, 58.00)	22.00 (12.00, 60.00)	0.220
B3, median (IQR)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.004
B4, median (IQR)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	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, 0.00)	3.00 (0.00, 7.00)	0.00 (0.00, 0.00)	0.00 (0.00, 4.00)	0.00 (0.00, 0.00)	<0.001