Table 2.
Treatment results between ENI and IFI
| Factors | ENI n (%) | IFI n (%) | χ2 | P value |
|---|---|---|---|---|
| Total | ||||
| Subgroup | 28 | 29 | ||
| State at analysis | ||||
| Alive | 11 (39.3) | 18 (62.1) | 2.959 | 0.085 |
| Dead | 17 (60.7) | 11 (37.9) | ||
| Cause of death | ||||
| Cancer related | 12 (42.9) | 8 (28.5) | 0.15 | 0.903 |
| Non-cancer related | 5 (17.9) | 3 (10.7) | ||
| First locoregional failure | 5 (17.9) | 6 (20.7) | 0.073 | 0.786 |
| Primary tumor | 4 (14.3) | 2 (6.9) | ||
| Regional lymph node | 1 (3.6) | 4 (13.8) | ||
| First distance metastasis | 7 (25.0) | 7 (24.1) | 0.006 | 0.940 |
| Lymph node | 2 (7.1) | 3 (10.7) | ||
| Lung | 2 (7.1) | 2 (6.9) | ||
| Liver | 1 (3.6) | 1 (3.4) | ||
| Bone | 2 (7.2) | 1 (3.4) | ||
| PFS | ||||
| 1-year | 18 (63.2) | 23 (78.2) | 1.593 | 0.207 |
| 3-year | 12 (43.5) | 17 (60.1) | 1.416 | 0.234 |
| 5-year | 6 (21.8) | 16 (55.1) | 6.844 | 0.009 |
| OS | ||||
| 1-year | 22 (78.6) | 21 (72.9%) | 0.292 | 0.589 |
| 3-year | 13 (46.9) | 17 (59.7%) | 0.849 | 0.357 |
| 5-year | 7 (23.5) | 16 (54.3%) | 5.388 | 0.020 |
Abbreviation: ENI, elective lymph node irradiation; IFI, involved field irradiation; OS, overall survival; PFS, progress-free survival.