Table 4.
Univariate Analysis of Late Grade 4-5 Toxicity (all patients)
| Variable | P |
|---|---|
| Lung | |
| Mean | .63 |
| V5 | .48 |
| V20 | .66 |
| V30 | .37 |
| PTV, cm3 | .41 |
| Bronchial tree dose* | |
| Max | .020 |
| Mean | .072 |
| D1cc | .012 |
| D2cc | .007 |
| D3cc | .004 |
| Heart dose | |
| Mean | .16 |
| V5 | .44 |
| V50 | .43 |
| Esophageal dose | |
| Max | .66 |
| Mean | .74 |
| D1cc | .72 |
| D2cc | .80 |
| D3cc | .80 |
Abbreviations: DXcc, maximum dose D such that X cm3 of the structure received a dose ≥ D, where D is measured in Gy; max, maximum; PTV, planning target volume; VX, percent volume receiving a dose of ≥ X Gy.
*
Proximal bronchial tree defined as per Radiation Therapy Oncology Group 0813.