Table 1.

Mann–Whitney U test of each texture feature in multiphase contrast-enhanced CT imaging in differentiating ICC with isocitrate dehydrogenase (IDH) mutation from those without.

Texture feature	Plain	AP	VP	EP
5th percentile	0.731	0.731	0.651	0.085
10th percentile	0.651	0.229	0.731	0.254
25th percentile	0.813	0.303	0.302	0.651
50th percentile	0.731	0.731	0.041*	0.813
75th percentile	0.781	0.047*	0.035*	0.813
90th percentile	0.302	0.065	0.030*	0.813
Entropy	0.035*	0.731	0.731	0.045*
Kurtosis	0.731	0.731	0.731	0.302
Max frequency	0.302	0.302	0.731	0.302
Mean	0.731	0.731	0.085	0.731
Mode	0.355	0.027*	0.027*	0.227
Skew	0.731	0.731	0.302	0.731
Standard deviation	0.035*	0.731	0.008*	0.043*
Contrast	0.302	0.302	0.058	0.731
Correlation	0.333	0.731	0.285	0.732
Energy	0.705	0.731	0.702	0.802
Entropy (H)	0.452	0.796	0.302	0.333
Homogeneity	0.302	0.055	0.331	0.331

AP arterial phase, VP portal venous phase, EP equilibrium phase.

Data are p value; *p < 0.05.