Table 1.
Baseline Characteristics of 341 Patients
| Characteristics | All Patients (n=341) | Non-Surgery (n=283) | Surgery (n=58) | χ2/t | P value |
|---|---|---|---|---|---|
| Age | 47.26 (10.68) | 47.63 (10.77) | 45.45 (10.13) | 1.42 | 0.158 |
| Sex | |||||
| Male | 230 (67.45%) | 183 (64.66%) | 47 (81.03%) | 5.88 | 0.025 |
| Female | 111 (32.55%) | 100 (35.34%) | 11 (18.97%) | ||
| T stage | |||||
| 1 | 90 (26.39%) | 56 (19.79%) | 34 (58.62%) | 37.36 | <0.001 |
| 2 | 251 (73.61%) | 227 (80.21%) | 24 (41.38%) | ||
| N stage | |||||
| 0 | 174 (51.03%) | 131 (46.29%) | 43 (74.14%) | 14.94 | <0.001 |
| 1 | 167 (48.97%) | 152 (53.71%) | 15 (25.86%) | ||
| Clinical stage | |||||
| I | 58 (17.01%) | 33 (11.66%) | 25 (43.10%) | 33.71 | <0.001 |
| II | 283 (82.99%) | 250 (88.34%) | 33 (56.90%) | ||
| Radiotherapy | |||||
| IMRTa | 232 (68.04%) | 194 (68.55%) | 38 (65.52%) | 0.20 | 0.774 |
| 2DRTb | 109 (31.96%) | 89 (31.45%) | 20 (34.48%) | ||
| Concurrent Chemotherapy | |||||
| Without | 45 (13.20%) | 39 (13.78%) | 6 (10.34%) | 0.50 | 0.546 |
| With | 296 (86.80%) | 244 (86.22%) | 52 (89.66%) | ||
| Residual_position | |||||
| No | 289 (84.75%) | 231 (81.63%) | 58 (100.00%) | 12.57 | 0.007 |
| NPc | 29 (8.50%) | 29 (10.25%) | 0 (0.00%) | ||
| LNd | 22 (6.45%) | 22 (7.77%) | 0 (0.00%) | ||
| NP&LN | 1 (0.29%) | 1 (0.35%) | 0 (0.00%) |
Notes: aIntensity modulated radiotherapy; b2-dimensional radiotherapy; cNasopharynx; dCervical lymph nodes. Bold formatting indicates statistically significant.