Table 2.
Summary of significant Mann–Whitney U tests for percentage change in radiomics features between pre- and post-contrast images
| Radiomic feature | No-upgrade | Upgrade | p-value |
|---|---|---|---|
| Median (IQR) | Median (IQR) | ||
| Minimum (FO) |
122 (80 to 228) |
184 (111 to 333) |
0.041 |
| Sum average (GLCM) |
− 16.7 (− 23.9 to − 1.1) |
− 21.8 (− 35.4 to − 8.3) |
0.047 |
| Auto correlation (GLCM) |
− 26.4 (− 38.7 to 0.5) |
− 32.3 (− 54.3 to − 12.8) |
0.044 |
| lrhgle (RLM) |
− 35.7 (− 47.9 to − 13.6) |
− 44.8 (− 63.9 to − 22.6) |
0.026 |
| rlv (RLM) |
− 30.0 (− 48.1 to − 5.8) |
− 39.2 (− 58.7 to − 24.0) |
0.045 |
| lzhgle (SZM) |
− 46.7 (− 60.6 to − 20.0) |
− 63.8 (− 73.0 to − 39.7) |
0.008 |
| hde (NGLDM) |
− 21.1 (− 36.8 to − 3.8) |
− 30.4 (− 44.4 to − 14.4) |
0.047 |
| hgce (NGLDM) |
− 31.4 (− 41.6 to − 4.7) |
− 38.0 (− 56.8 to − 14.6) |
0.047 |
| hdhge (NGLDM) |
− 42.4 (− 60.6 to − 20.0) |
− 61.8 (− 72.9 to − 30.5) |
0.006 |
| Busyness (NGTDM) |
108 (47 to 176) |
160 (63 to 206) |
0.047 |
Median values with associated interquartile range (IQR) are reported as non-parametric tests were performed. Features selected for advancement to model development are italicized
FO first-order, GLCM gray-level co-occurrence matrix, RLM run-length matrix, SZM size zone matrix, NGLDM neighborhood gray-level dependence matrix, NGTDM neighborhood gray-tone difference matrix, lrhgle long-run high gray-level emphasis, rlv run-length variance, lzhgle large zone high gray-level emphasis, hde high dependence emphasis, hgce high gray-level count emphasis, hdhge high dependence high gray-level emphasis