Patient and Tumor Characteristics
| Variable | n | % |
|---|---|---|
| Age | ||
| ≤60 y | 34 | 25.8 |
| >60 y | 98 | 74.2 |
| Sex | ||
| Male | 76 | 57.6 |
| Female | 56 | 42.4 |
| Tumor size | ||
| <3 cm | 77 | 58.3 |
| ≥3 cm | 55 | 41.7 |
| Histology | ||
| Adenocarcinoma | 103 | 78.0 |
| Squamous cell carcinoma | 21 | 15.9 |
| Adenosquamous cell carcinoma | 5 | 3.8 |
| Large cell carcinoma | 2 | 1.5 |
| Carcinoid | 1 | 0.8 |
| Pathologic N stage | ||
| pN0 | 92 | 69.7 |
| pN1 | 14 | 10.6 |
| pN2 | 26 | 19.7 |
| Pathologic stage | ||
| IA | 64 | 48.5 |
| IB | 24 | 18.2 |
| IIA | 3 | 2.3 |
| IIB | 10 | 7.6 |
| IIIA | 26 | 19.7 |
| IIIB | 5 | 3.8 |
| Intratumoral lymphatic vessel invasion | ||
| Negative | 66 | 68.8 |
| Positive | 30 | 31.2 |
| 18F-FDG uptake | ||
| Low | 17 | 12.9 |
| Moderate | 20 | 15.1 |
| High | 95 | 72.0 |