Factor | Training cohort | Validation cohort | ||
---|---|---|---|---|
3-year OS (%) | PÂ value | 3-year OS (%) | PÂ value | |
Sex | Â | 0.100 | Â | 0.268 |
 Male | 57.9 |  | 50.1 |  |
 Female | 69.6 |  | 65.1 |  |
Age (y) | Â | 0.088 | Â | 0.072 |
 < 58 | 66.8 |  | 62.2 |  |
 ≥ 58 | 54.4 |  | 44.9 |  |
ECOG score | Â | 0.001 | Â | 0.113 |
 0 | 68.2 |  | 76.0 |  |
 1 | 63.1 |  | 49.1 |  |
 2 | 33.1 |  | 53.3 |  |
Weight loss ≥ 5 kg |  | 0.018 |  | 0.308 |
 Yes | 38.7 |  | 33.3 |  |
 No | 62.2 |  | 54.1 |  |
Smoke index ≥ 400 |  | 0.419 |  | 0.087 |
 Yes | 56.8 |  | 44.5 |  |
 No | 64.2 |  | 62.0 |  |
Pathological types | Â | 0.512 | Â | 0.521 |
 Squamous cell carcinoma | 56.2 |  | 60.1 |  |
 Non-squamous cell carcinoma | 65.5 |  | 59.4 |  |
GTV risk group |  |  < 0.001 |  |  < 0.001 |
 I | 79.2 |  | 85.5 |  |
 II | 56.8 |  | 46.4 |  |
 III | 37.4 |  | 18.5 |  |
TNM stage | Â | 0.127 | Â | 0.297 |
 IIIA | 58.7 |  | 59.6 |  |
 IIIB | 65.3 |  | 49.5 |  |
 IIIC | 49.7 |  | 53.2 |  |
The integrated GTV-TNM stratification system |  |  < 0.001 |  |  < 0.001 |
 Stratum A | 78.4 |  | 82.4 |  |
 Stratum B | 63.7 |  | 56.8 |  |
 Stratum C | 38.1 |  | 24.7 |  |
Neoadjuvant chemotherapy | Â | 0.867 | Â | 0.475 |
 Yes | 59.6 |  | 56.1 |  |
 No | 60.9 |  | 41.3 |  |
Adjuvant chemotherapy | Â | 0.382 | Â | 0.713 |
 Yes | 55.7 |  | 52.6 |  |
 No | 61.2 |  | 52.9 |  |