Table 1.
Patient characteristics and treatment variables.
| Characteristic | n | % |
|---|---|---|
| Age (y) | ||
| Minimum | 25 | 18.12 |
| Maximum | 74 | 53.62 |
| Median | 47 | |
| Histology | ||
| Invasive ductal carcinoma | 134 | 97.10 |
| Invasive lobular carcinoma | 3 | 2.17 |
| Invasive papillary carcinoma | 1 | 0.72 |
| Tumor location | ||
| Left-sided | 73 | 52.90 |
| Right-sided | 65 | 47.10 |
| T stage | ||
| T0 | 2 | 1.45 |
| T1 | 39 | 28.26 |
| T2 | 79 | 57.25 |
| T3 | 11 | 7.97 |
| T4 | 6 | 4.35 |
| Tx | 1 | 0.72 |
| N stage | ||
| N0 | 6 | 4.35 |
| N1 | 46 | 33.33 |
| N2 | 52 | 37.68 |
| N3 | 33 | 23.91 |
| Nx | 1 | 0.72 |
| Radiotherapy | ||
| 3D-CRT | 48 | 34.78 |
| F-IMRT | 49 | 35.51 |
| I-IMRT | 41 | 29.71 |
| PTV | ||
| Chest wall | 7 | 5.07 |
| Chest wall+SCF | 131 | 94.93 |
SCF, supraclavicular fossa; 3D-CRT, three-dimensional conformal radiotherapy; F-IMRT, field-in-field forward intensity-modulated radiotherapy; I-IMRT, inverse IMRT.