TABLE 1.

Description of the variables for radiomic and bone morphometry features.

Features	Variables	Definitions
Grey-Level Co-occurrence Matrix (GLCM)	Energy	Uniformity of the grey-level textural organization.
	Entropy	Randomization of the grey-level distribution.
	Correlation	Grey-level linear dependence among the pixels.
	Inverse Difference Moment	Local homogeneity of the grey-level distribution.
	Inertia	Contrast between a pixel and its neighbor.
	Cluster Shade	Skewness and uniformity of the grey-level distribution.
	Cluster Prominence	Skewness and asymmetry of the grey-level distribution.
	Haralick Correlation	Linear dependence between the pixels.
Grey-Level Run Length Matrix (GLRLM)	Short Run Emphasis	Distribution of short run lengths.
	Long Run Emphasis	Distribution of long run lengths.
	Grey Level Non Uniformity	Variability of the grey-level intensity.
	Run Length Non Uniformity	Similarity of run lengths in the image.
	Low Grey Level Run Emphasis	Distribution of the lower grey-level values.
	High Grey Level Run Emphasis	Distribution of the higher grey-level values.
	Short Run Low Grey	Joint distribution of shorter run
	Level Run Emphasis	lengths with lower grey-level values.
	Short Run High Grey	Joint distribution of shorter run
	Level Run Emphasis	lengths with higher grey-level values.
	Long Run Low Grey	Joint distribution of long run
	Level Run Emphasis	lengths with lower grey-level values.
	Long Run High Grey	Joint distribution of long run
	Level Run Emphasis	lengths with higher grey-level values.
Bone Morphometry	BV/TV	Ratio between bone volume and total volume.
	Tb.Th	Trabecular thickness.
	Tb.Sp	Trabecular separation.
	Tb.N	Trabecular number.
	BS/BV	Ratio between bone surface and bone volume.