Table 1.
Values of the features of low- and high-grade tumors.
| Features | Low-grade | High-grade | P value | ||
|---|---|---|---|---|---|
| Mean ± SD | Median | Mean ± SD | Median | ||
| Textural | |||||
| T A(1,1,1) | 0.025 | 0.026 | 0.201 | ||
| T Con(1,1,1) | 3.227 ± 0.696 | 3.260 ± 0.686 | 0.815 | ||
| T I(1,1,1) | 0.482 | 0.485 | 0.927 | ||
| T E(1,1,1) | 3.936 ± 0.206 | 3.911 ± 0.149 | 0.542 | ||
| T D(1,1,1) | 1.360 ± 0.170 | 1.372 ± 0.147 | 0.715 | ||
| T Cor(1,1,1) | 0.623 ± 0.088 | 0.590 ± 0.078 | 0.069 | ||
| T A(1,0,0) | 0.031 | 0.033 | 0.218 | ||
| T Con(1,0,0) | 1.874 ± 0.433 | 1.864 ± 0.354 | 0.914 | ||
| T I(1,0,0) | 0.583 ± 0.043 | 0.580 ± 0.032 | 0.747 | ||
| T E(1,0,0) | 3.727 ± 0.203 | 3.706 ± 0.151 | 0.608 | ||
| T D(1,0,0) | 1.002 ± 0.138 | 1.005 ± 0.108 | 0.900 | ||
| T Cor(1,0,0) | 0.783 ± 0.057 | 0.770 ± 0.041 | 0.233 | ||
| T A(0,1,0) | 0.026 | 0.027 | 0.214 | ||
| T Con(0,1,0) | 2.925 ± 0.631 | 2.959 ± 0.549 | 0.795 | ||
| T I(0,1,0) | 0.507 ± 0.044 | 0.501 ± 0.026 | 0.504 | ||
| T E(0,1,0) | 3.905 ± 0.206 | 3.887 ± 0.146 | 0.647 | ||
| T D(0,1,0) | 1.291 ± 0.163 | 1.305 ± 0.119 | 0.658 | ||
| T Cor(0,1,0) | 0.661 ± 0.082 | 0.631 ± 0.060 | 0.072 | ||
| T A(0,0,1) | 0.040 | 0.043 | 0.496 | ||
| T Con(0,0,1) | 1.104 ± 0.271 | 1.134 ± 0.220 | 0.583 | ||
| T I(0,0,1) | 0.669 ± 0.039 | 0.661 ± 0.029 | 0.331 | ||
| T E(0,0,1) | 3.493 ± 0.198 | 3.489 ± 0.144 | 0.916 | ||
| T D(0,0,1) | 0.736 ± 0.109 | 0.754 ± 0.084 | 0.413 | ||
| T Cor(0,0,1) | 0.873 ± 0.034 | 0.860 ± 0.030 | 0.061 | ||
| Morphological | |||||
| M V | 2.596 × 103 | 2.904 × 103 | 0.824 | ||
| M A | 1.268 × 103 | 1.419 × 103 | 0.783 | ||
| M Rm | 9.259 ± 2.919 | 9.691 ± 3.774 | 0.502 | ||
| M Rstd | 1.533 | 1.896 | 0.599 | ||
| M Cc | 0.377 ± 0.101 | 0.373 ± 0.111 | 0.868 | ||
| M Cd | 0.998 ± 0.002 | 0.998 ± 0.003 | 0.111 | ||
| Ellipsoid fitting | |||||
| E A | 1.622 | 1.757 | 0.521 | ||
| E S | 1.238 ± 0.089 | 1.225 ± 0.114 | 0.503 | ||
| E V | 0.910 ± 0.015 | 0.913 ± 0.018 | 0.427 | ||
| E RO | 15 | 18 | 0.082 | ||
| E RI | 7 | 10 | 0.055 | ||
| E R | 23 | 30 | 0.047 | ||
| E ROa | 4 | 4 | 0.642 | ||
| E RIa | 1 | 1 | 0.842 | ||
| E Ra | 5 | 5 | 0.595 | ||
| Posterior acoustic | |||||
| P std | 33.459 ± 6.517 | 34.870 ± 7.021 | 0.305 | ||
| P Rstd | 1.438 ± 0.318 | 1.570 ± 0.408 | 0.061 | ||
| P Sstd | 9.841 ± 6.939 | 12.173 ± 8.391 | 0.122 | ||
| P Sm | 32.666 ± 26.935 | 42.986 ± 34.495 | 0.083 | ||
| P Rm | 1.802 ± 0.780 | 2.035 ± 0.851 | 0.158 | ||
The mean value, standard deviation (SD), median value, and P value of t-test or Mann-Whitney U test of each feature. Student's t-test was applied if a feature is normally distributed; otherwise, Mann-Whitney U test was applied. The Kolmogorov-Smirnov test was applied to normality test.