Table 1.
Baseline patient characteristics.
| RT alone (n=97) | CRT (n=165) | P-value | |
|---|---|---|---|
| Gender | 0.007 | ||
| Male | 68 | 139 | |
| Female | 29 | 26 | |
| Age, years | 0.000 | ||
| Range | 41–84 | 40–80 | |
| Median | 64 | 55 | |
| Primary tumor site | 0.516 | ||
| Cervical | 6 | 20 | |
| Upper thoracic | 33 | 46 | |
| Middle thoracic | 44 | 71 | |
| Low thoracic | 11 | 22 | |
| Diffuse | 3 | 6 | |
| Primary tumor length | 0.806 | ||
| Range | 1.7–12 | 1.0–15.2 | |
| Median | 6 | 5.7 | |
| T stage | 0.220 | ||
| T1 | 2 | 7 | |
| T2 | 15 | 34 | |
| T3 | 46 | 58 | |
| T4 | 34 | 66 | |
| N stage | 0.200 | ||
| N0 | 35 | 47 | |
| N1 | 62 | 118 | |
| M stage | 0.278 | ||
| M0 | 72 | 112 | |
| M1a | 25 | 53 | |
| Clinical stage | 0.188 | ||
| I + II | 22 | 26 | |
| III | 52 | 85 | |
| IV | 23 | 54 | |
| Pathology differentiation | 0.817 | ||
| Well | 13 | 22 | |
| 6Moderate | 29 | 56 | |
| Poor | 42 | 67 | |
| Radiotherapy technique | 0.062 | ||
| 2DRT | 20 | 17 | |
| 3DRT | 32 | 57 | |
| IMRT | 45 | 91 | |
| Radiation dose for GTV (Gy) | 0.176 | ||
| <60 Gy | 15 | 24 | |
| 60–65 Gy | 31 | 71 | |
| >65 Gy | 51 | 70 |
RT – radiotherapy; CRT – concurrent chemoradiotherapy; 2DRT – conventional radiotherapy; 3DRT – three-dimensional conformal radiotherapy; IMRT – intensity-modulated radiation therapy; GTV – gross tumor volume.