Table 4 Determination of optimal cut-off values for the irradiated small-bowel volume by varying radiation dose
Cut-off values (cc*) | Sensitivity (%) | Specificity (%) | Youden | |
|---|---|---|---|---|
V5 | 291.94 | 82.1 | 70.6 | .53 |
V10 | 321.52 | 64.3 | 76.5 | .41 |
V15 | 125,26 | 64.3 | 82.4 | .47 |
V20 | 96,.84 | 53.6 | 88.2 | .42 |
V25 | 13.50 | 100.0 | 41.2 | .41 |
V30 | 9.62 | 96.4 | 41.2 | .38 |
V35 | 7.03 | 96.4 | 41.2 | .38 |
V40 | 4.85 | 89.3 | 41.2 | .31 |
V45 | 1.24 | 67.9 | 47.1 | .15 |