Table 4.
C-index comparison analysis with multivariable models of the analyzed segmentation methods
| Model | C-index values for overall survival | C-index values for disease-free survival | ||
|---|---|---|---|---|
| Absolute threshold of SUV2.5 | Background-level thresholdª | Absolute threshold of SUV2.5 | Background-level thresholdª | |
|
Dichotomized MTV model |
0.664 | 0.673 | 0.657 | 0.673 |
|
Continuous MTV model |
0.681 | 0.676 | 0.677 | 0.676 |
|
Dichotomized TLG model |
0.676 | 0.696 | 0.669 | 0.675 |
|
Continuous TLG model |
0.662 | 0.663 | 0.678 | 0.677 |
ªUsing the liver as the reference region
MTV metabolic tumor volume, TLG total lesion glycolysis, C-index Concordance index, ml milliliter, g gram