Table 1. Clinicopathological characteristics of the patients.
| Characteristics | Training set (N = 70) | Validation set (N = 26) | |
| Age | <70 | 40 (57.1%) | 19 (73.1%) |
| ≧70 | 30 (42.9%) | 7 (26.9%) | |
| Gender | Male | 52 (74.3%) | 16 (61.5%) |
| Female | 18 (25.7%) | 10 (38.5%) | |
| Stage | I | 19 (27.2%) | 17 (65.4%) |
| II | 11 (15.7%) | 2 (7.7%) | |
| III | 26 (37.1%) | 4 (15.4%) | |
| IV | 14 (20.0%) | 3 (11.5%) | |
| Tumor differentiation | Well | 7 (13.2%) | 11 (52.4%) |
| (NSCLC) | Moderate | 10 (18.9%) | 5 (23.8%) |
| Poor | 18 (34.0%) | 4 (19.0%) | |
| Unknown | 18 (34.0%) | 1 (4.8%) | |
| Tumor size | <3 cm | 24 (34.3%) | 15 (57.7%) |
| ≧3 cm | 45 (64.3%) | 6 (23.1) | |
| Unknown | 1 (1.4%) | 5 (19.2) | |
| Nodal status | N0 | 23 (32.9%) | 18 (69.3%) |
| N1 | 12 (17.1%) | 1 (3.8%) | |
| N2 | 23 (32.9%) | 5 (19.2%) | |
| N3 | 12 (17.1%) | 2 (7.7%) | |
| Distant metastasis | M0 | 56 (80.0%) | 23 (88.5%) |
| M1 | 14 (20.0%) | 3 (11.5%) | |
| Histological type | ADa | 29 (41.4%) | 20 (77.0%) |
| SCCb | 21 (30.0%) | 0 (0.0%) | |
| SCLCc | 17 (24.3%) | 5 (19.2%) | |
| LCNECd | 3 (4.3%) | 1 (3.8%) |
a
Adenocarcinoma.
b
Squamous cell carcinoma.
c
Small cell lung carcinoma.
d
Large cell neuroendocrine carcinoma.