Table 2.

Characteristics of the subtype-specific prognostic radiomics features.

Feature	Feature Name	Subtype	Type	Phase	Region	Class	HR (95% CI)	p
PRF1	Minimum	FIFS1	Type2	venous	tumor	first-order	0.17 (0.05–0.55)	0.008
PRF2	LargeAreaHighGrayLevelEmphasis	FIFS1	Type3	venous	margin	texture-glszm	0.07 (0.02–0.24)	0.001
PRF3	LargeDependenceLowGrayLevelEmphasis	FIFS1	Type2	venous	tumor	texture-gldm	0.28 (0.08–0.92)	0.043
PRF4	LowGrayLevelZoneEmphasis	FIFS1	Type2	venous	tumor	texture-glszm	0.19 (0.06–0.61)	0.016
PRF5	ShortRunHighGrayLevelEmphasis	FIFS1	Type4	artery	peritumor	texture-glrlm	0.09 (0.03–0.28)	0.003
PRF6	LowGrayLevelEmphasis	FIFS1	Type2	venous	tumor	texture-gldm	0.20 (0.06–0.66)	0.021
PRF7	LowGrayLevelRunEmphasis	FIFS1	Type2	venous	tumor	texture-glrlm	0.19 (0.06–0.61)	0.016
PRF8	SmallAreaLowGrayLevelEmphasis	FIFS1	Type2	venous	tumor	texture-glszm	0.23 (0.07–0.76)	0.039
PRF9	SurfaceVolumeRatio	FIFS1	Type2	venous	tumor	shape	0.06 (0.02–0.22)	<0.001
PRF10	SurfaceVolumeRatio	FIFS1	Type1	artery	tumor	shape	0.06 (0.02–0.21)	<0.001
PRF11	Idmn	FIFS2	Type1	artery	tumor	texture-glcm	3.74 (1.13–12.38)	0.035
PRF12	Idmn	FIFS2	Type2	venous	tumor	texture-glcm	14.84 (4.45–49.53)	0.001
PRF13	Idn	FIFS2	Type2	venous	tumor	texture-glcm	5.34 (1.63–17.50)	0.016
PRF14	LargeAreaHighGrayLevelEmphasis	FIFS2	Type2	venous	tumor	texture-glszm	15.61 (4.65–52.40)	<0.001
PRF15	LargeDependenceHighGrayLevelEmphasis	FIFS2	Type2	venous	tumor	texture-gldm	6.28 (1.89–20.82)	0.007
PRF16	LongRunLowGrayLevelEmphasis	FIFS2	Type4	artery	peritumor	texture-glrlm	4.88 (1.49–15.92)	0.024
PRF17	DifferenceVariance	FIFS2	Type3	venous	peritumor	texture-glcm	4.73 (1.45–15.41)	0.028
PRF18	Contrast	FIFS2	Type3	venous	peritumor	texture-glcm	5.34 (1.63–17.48)	0.016