Table 2.

Multivariate analysis results.

SSF	Texture Parameter
	Mean	SD	MPP	Entropy	Skewness	Kurtosis
0	0.01	0.027	0.01	0.02	0.027	0.009
2	0.025	0.082	0.053	0.683	0.375	0.017
4	0.016	0.119	0.018	0.455	0.034	0.088
6	0.019	0.507	0.021	0.433	0.028	0.341

Statistically significant results of the Kruskal–Wallis test are highlighted in bold. SSF, the spatial scale of the band-pass filter; SD, standard deviation of pixel intensity; MPP, mean of positive pixels.