Table 1.
Patient demographics and clinical characteristics
| Variables | Value (%) |
|---|---|
| Number | 498 |
| Age (years) mean ± SD (range) | 60.74 ± 7.21 (36–80) |
| Gender (M/F) | 367/131 |
| Tumor location (%) | |
| Cervical | 16 (3.2) |
| Upper thoracic | 90 (18.1) |
| Middle thoracic | 248 (49.8) |
| Lower thoracic | 144 (28.9) |
| Tumor size (cm) | |
| Mean ± SD (range) | 1.83 ± 1.02 (0.1–6.5) |
| Pathologic appearance (%) | |
| Erosive type | 99 (19.9) |
| Ulcerative type | 123 (24.7) |
| Fungating type | 84 (16.9) |
| Other types | 66 (13.3) |
| Unavailable | 126 (25.3) |
| Differentiation (%) | |
| I | 24 (4.8) |
| I–II | 71 (14.3) |
| II | 185 (37.1) |
| II–III | 86 (17.3) |
| III | 46 (9.2) |
| Unavailable | 86 (17.3) |
| Depth of invasion (%) | |
| m1 | 43 (8.6) |
| m2 | 37 (7.4) |
| m3 | 80 (16.1) |
| sm1 | 88 (17.7) |
| sm2 | 113 (22.7) |
| sm3 | 137 (27.5) |
| Multicentric invasion (%) | |
| Absent | 487 (97.8) |
| Present | 11 (2.2) |
| Angiolymphatic invasion (%) | |
| Absent | 467 (93.8) |
| Present | 31 (6.2) |
SD standard deviation