Table 2.

Associations (p-value) between texture PET parameters and tumor characteristics.

	dbPET		PET/CT
	Tis-1 vs. T2-4	Luminal A vs. Others	Tis-1 vs. T2-4	Luminal A vs. Others
Num of Voxels	NS	NS	0.0179	NS
SUVsum	NS	NS	0.0047	0.0284
SDhist	<0.0001	NS	NS	NS
Skewness	0.0003	NS	0.0084	NS
Kurtosis	<0.0001	NS	0.0104	0.0152
EnergyHist	0.0003	NS	<0.0001	NS
EntropyHist	0.0006	NS	<0.0001	NS
HomogeneityGLCM	NS	NS	NS	NS
EnergyGLCM	NS	NS	0.0157	NS
CorrelationGLCM	NS	NS	0.0359	NS
ContrastGLCM	NS	NS	NS	NS
EntropyGLCM	<0.0001	0.0404	0.0157	NS
DissimilarityGLCM	<0.0001	NS	NS	NS
SRE	0.0005	NS	NS	NS
LRE	<0.0001	NS	NS	NS
LGRE	<0.0001	NS	0.009	NS
HGRE	<0.0001	NS	NS	NS
SRLGE	<0.0001	0.0302	0.0073	NS
SRHGE	<0.0001	0.036	NS	NS
LRLGE	NS	NS	0.0097	NS
LRHGE	NS	NS	NS	NS
GLNUr	NS	NS	NS	NS
RLNU	NS	NS	0.0147	NS
RP	NS	NS	NS	NS
SZE	NS	NS	NS	NS
LZE	<0.0001	NS	NS	NS
LGZE	<0.0001	NS	0.0058	NS
HGZE	<0.0001	NS	NS	0.0302
SZLGE	<0.0001	NS	0.0128	NS
SZHGE	<0.0001	0.032	NS	NS
LZLGE	NS	NS	NS	NS
LZHGE	NS	NS	NS	0.0196
GLNUz	NS	NS	NS	NS
ZSNU	0.0073	NS	0.0084	NS
ZP	0.0318	NS	NS	NS
CoarsenessNGLDM	0.0032	NS	NS	NS
ContrastNGLDM	<0.0001	NS	NS	NS
BusynessNGLDM	<0.0001	NS	0.0233	NS

Numbers are p-values when there was a significant difference. NS not significant.

SUV, standardized uptake value; SUV_sum, sum of SUV; SDhist, standard deviation from a histogram; Energy_Hist, energy from a histogram; Entropy_Hist, entropy from a histogram; GLCM, gray-level cooccurence matrix; SRE, short-run emphasis; LRE, long-run emphasis; LGRE, low gray-level run emphasis; HGRE, high gray-level run emphasis; SRLGE, short-run low gray-level emphasis; SRHGE, short-run high gray-level emphasis; LRLGE, long-run low gray-level emphasis; LRHGE, long-run high gray-level emphasis; GLNUr, gray-level non-uniformity for run; RLNU, run-length non-uniformity; RP, run percentage; SZE, short-zone emphasis; LZE, long-zone emphasis; LGZE, low gray-level zone emphasis; HGZE, high gray-level zone emphasis; SZLGE, short-zone low gray-level emphasis; SZHGE, short-zone high gray-level emphasis; LZLGE, long-zone low gray-level emphasis; LZHGE, long-zone high gray-level emphasis; GLNUz, gray-level non-uniformity for zone; ZSNU, zone-size nonuniformity; ZP, zone percentage; NGLDM, neighborhood gray-level different matrix; Coarseness_NGLDM, coarseness from a NGLDM; Contrast_NGLDM, contrast from a NGLDM; Busyness_NGLDM, busyness from a NGLDM.