Table 3.
Univariate and multivariate regression analysis of IIMN dose difference.
| Characteristic | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| r | p-value | Coefficient (SE) | p-value | |
| Height | −0.150 | 0.080 | ||
| Body weight | −0.443 | 0.000 | −4.016 | 0.000 |
| BMI | −0.363 | 0.000 | ||
| BSA | −0.429 | 0.000 | ||
| T stage | 0.089 | 0.301 | ||
| N stage | 0.130 | 0.130 | ||
| DAP | 0.074 | 0.387 | ||
| DT | −0.407 | 0.000 | ||
| RT/AP | 0.215 | 0.011 | 5.359 | 0.000 |
| Internal thoracic vessels | 0.128 | 0.134 | ||
| CTV volume | −0.091 | 0.287 | ||
| PTV volume | 0.004 | 0.959 | ||
| PTVIMN volume | −0.035 | 0.680 | ||
| IMNin | 0.734 | 0.000 | ||
| RIMNin | 0.757 | 0.000 | 12.697 | 0.000 |
| Irradiation technique | 0.116 | 0.175 | ||
| SCF | −0.919 | 0.828 | ||
| Cranial border (CTV) | −0.018 | 0.835 | ||
| Medial border (CTV) | −0.110 | 0.199 | ||
| Posterior border (PTV) | −0.286 | 0.001 | ||
| Wedge-shaped plate | 0.250 | 0.087 | ||
| Incident angles | −0.091 | 0.287 | ||
BMI, body mass index; BSA, body surface area; CTV, clinical target volume; PTV, planning target volume; DT, thoracic transverse diameter; DAP, thoracic anteroposterior diameter; SCF, supraclavicular fossa; PTVIMN, planning target volume of IMN; IMNin, PTVIMN included in PTV.