Table 2 The clinical characteristics in validation set
Clinical characteristics | Number (90) | % |
|---|---|---|
Age(year) | Â | Â |
 Median (Min, Max) | 59 (31–79) | - |
Gender | Â | Â |
 Male | 47 | 52.22 |
 Female | 43 | 47.78 |
ECOG-PS | Â | Â |
 0 | 35 | 38.89 |
 1 | 55 | 61.11 |
Smoking history | Â | Â |
 Non-smoker | 50 | 55.56 |
 Smoker | 40 | 44.44 |
Clinical stage | Â | Â |
 Stage I | 41 | 45.56 |
 Stage II | 8 | 8.89 |
 Stage III | 41 | 45.56 |
Tumor size | Â | Â |
 T1 | 50 | 55.56 |
 T2 | 36 | 40.00 |
 T3 + T4 | 4 | 4.44 |
Lymph node metastasis | Â | |
 N0 | 43 | 47.78 |
 N1 | 7 | 7.78 |
 N2 | 40 | 44.44 |