Table 3.
Subgroup analysis of OS by different factors
| Characteristics | 1-year OS rate (%) | 3-year OS rate (%) | 5-year OS rate (%) | 8-year OS rate (%) | P | ||||
|---|---|---|---|---|---|---|---|---|---|
| ENI | IFI | ENI | IFI | ENI | IFI | ENI | IFI | ||
| Sex | |||||||||
| Male | 76.9 | 92.0 | 38.1 | 46.2 | 32.6 | 26.9 | 27.2 | 10.8 | 0.858 |
| Female | 91.3 | 87.5 | 60.6 | 58.3 | 45.4 | 47.7 | 34.1 | 41.8 | 0.784 |
| Age at diagnosis (year) | |||||||||
| ≤65 | 85.7 | 87.5 | 48.3 | 53.1 | 38.6 | 42.1 | 30.1 | 29.8 | 0.861 |
| > 65 | 78.6 | 94.1 | 50.0 | 50.3 | 40.0 | 25.2 | 40.0 | 16.8 | 0.950 |
| ECOG PS | |||||||||
| 0 | 86.4 | 88.1 | 49.8 | 54.8 | 39.5 | 39.1 | 31.9 | 27.2 | 0.981 |
| 1–2 | 60.0 | 100.0 | – | 42.9 | – | – | – | – | 0.979 |
| cT stage | |||||||||
| T3 | 85.4 | 87.8 | 48.0 | 55.8 | 39.0 | 38.1 | 29.3 | 25.4 | 0.892 |
| T4 | 75.0 | 100.0 | 50.0 | 33.3 | 37.5 | 33.3 | – | 33.3 | 0.818 |
| cN stage | |||||||||
| N0 | 91.7 | 100.0 | 48.6 | 54.5 | 38.9 | 24.2 | 38.9 | 24.2 | 0.601 |
| N+ | 81.1 | 86.8 | 48.5 | 51.9 | 38.8 | 41.9 | 27.6 | 26.9 | 0.722 |
| 8th AJCC stage | |||||||||
| II–III | 85.4 | 87.8 | 48.0 | 55.8 | 39.0 | 38.1 | 29.3 | 25.4 | 0.892 |
| IV | 75.0 | 100.0 | 50.0 | 33.3 | 37.5 | 33.3 | – | 33.3 | 0.818 |
| Radiation dose (Gy) | |||||||||
| ≥ 50 Gy, ≤ 59.4 Gy | 80.0 | 86.7 | 58.3 | 35.6 | 36.5 | 23.7 | – | 23.7 | 0.551 |
| > 59.4 Gy, ≤ 66 Gy | 85.3 | 91.2 | 43.7 | 58.8 | 37.5 | 42.9 | 33.7 | 28.8 | 0.637 |