Table 4.

Kruskal-Wallis values obtained by grouping PC scores by total SVD score. The results are expressed concerning χ² and Pr (p-value). The degrees of freedom were four. Enh, RPS, GLCM, ULBP, LCP, AUEC and slope stand for signal enhancement, radial power spectrum, grey co-occurrence matrix metrics, uniform local binary patterns, linear configuration model, area under enhancement curve, and enhancement curve slope, respectively. Values in bold are significant (p-value < 0.05).

Method		Low	Low-middle					Middle-high				High
		BL	CSF	BL	GMD	GMC	WM	BL	CSF	GMC	WM	BL	GMC	WM
Enh	χ2	4.93	3.38	4.00	3.53	3.20	6.50	2.88	4.02	3.00	8.09	4.97	7.57	5.35
	Pr	0.29	0.50	0.41	0.47	0.52	0.16	0.58	0.40	0.56	0.09	0.29	0.11	0.25
RPS	χ2	10.49	7.69	2.32	15.56	8.35	5.87	5.91	7.54	10.15	9.28	6.58	6.64	8.97
	Pr	0.03	0.09	0.68	0.01	0.08	0.21	0.21	0.11	0.04	0.05	0.16	0.16	0.06
GLCM	χ2	2.32	4.70	4.55	2.44	5.03	6.01	3.46	5.52	2.65	6.50	0.44	0.92	6.06
	Pr	0.67	0.32	0.33	0.65	0.28	0.19	0.48	0.24	0.61	0.17	0.97	0.92	0.19
ULBP	χ2	4.31	5.16	1.00	4.41	3.25	10.83	2.17	2.52	2.72	11.45	1.06	6.54	11.09
	Pr	0.37	0.27	0.91	0.35	0.52	0.03	0.70	0.64	0.61	0.02	0.90	0.16	0.03
LCP	χ2	9.69	6.57	0.55	4.19	3.85	7.56	2.59	4.62	0.98	10.26	2.64	3.78	7.76
	Pr	0.04	0.16	0.97	0.38	0.43	0.11	0.63	0.33	0.91	0.03	0.62	0.44	0.10
AUEC	χ2	4.99	3.45	6.32	3.64	4.28	6.50	2.82	3.39	2.97	8.62	5.50	7.65	5.45
	Pr	0.29	0.49	0.18	0.46	0.37	0.16	0.59	0.49	0.56	0.07	0.24	0.11	0.24
Slope	χ2	4.40	3.30	4.60	1.62	2.35	1.61	6.39	5.44	7.98	2.29	4.08	2.26	1.66
	Pr	0.35	0.51	0.33	0.80	0.67	0.81	0.17	0.24	0.09	0.68	0.40	0.69	0.80