Table 5 Pattern of disease progression
Variable | Surgery (n = 296) (%) | Surgery + postoperative radiotherapy (n = 251) (%) | χ2value | P-value |
|---|---|---|---|---|
Site of lymph node metastasis | ||||
Cervical lymph nodes | 42 (14.2) | 13 (5.2) | 12.192 | <0.0001 |
Mediastinal lymph nodes | 23 (7.8) | 9 (3.6) | 4.318 | 0.038 |
Abdominal lymph nodes | 10 (3.4) | 13 (5.2) | 1.094 | 0.296 |
Tumor bed | 6 (2.0) | 2 (0.8) | 1.426 | 0.2326 |
Distant metastasis | 70 (23.6) | 57 (22.7) | 0.067 | 0.795 |
Locoregional and distant recurrence | 126 (42.6) | 93 (37.1) | 1.721 | 0.190 |