Table 1. Patient characteristics.
| Characteristics | Distribution (%) |
|---|---|
| Age | 58.54±8.94 |
| Gender | |
| Male | 84 (45.4) |
| Female | 101 (54.6) |
| Smoking history | |
| Yes | 63 (34.1) |
| No | 122 (65.9) |
| Tumor size (cm) | 2.37±0.72 |
| Clinical T stage | |
| T1a | 1 (0.5) |
| T1b | 39 (21.1) |
| T1c | 42 (22.7) |
| T2a | 103 (55.7) |
| Serum CEA (ng/mL) | |
| ≤5 | 153 (82.7) |
| >5 | 32 (17.3) |
| Tumor SUVmax | 5.21±3.97 |
| Tumor location | |
| Central | 13 (7.0) |
| Peripheral | 172 (93.0) |
| Nodule type | |
| GGO | 36 (19.5) |
| Solid | 149 (80.5) |
| Histology | |
| Squamous cell carcinoma | 10 (5.4) |
| Adenocarcinoma | 175 (94.6) |
| Micropapillary and solid patterns | |
| Present | 39 (21.1) |
| Absent | 136 (78.9) |
| Visceral pleural invasion | |
| Present | 68 (36.8) |
| Absent | 117 (63.2) |
| Number of dissection lymph node | 18 [7–48] |
| Pathological N stage | |
| N0 | 144 (77.9) |
| N1 | 28 (15.1) |
| N2 | 13 (7.0) |