Table 1.
Patient characteristics
| Variable | No. (%) |
|---|---|
| Age, median (range, yr) | 66 (48-73) |
| Tumor size, median (range, cm) | 4 (2-7) |
| Sex | |
| Male | 32 (97) |
| Female | 1 (3) |
| ECOG | |
| 0 | 25 (75.7) |
| 1 | 6 (18.2) |
| 2 | 2 (6.1) |
| Smoking history | |
| No | 8 (24.2) |
| Yes | 25 (75.8) |
| Radical resection | |
| Lobectomy | 23 (69.7) |
| Pneumonectomy | 10 (30.3) |
| pT stage | |
| T1 | 3 (9.1) |
| T2 | 16 (48.5) |
| T3 | 7 (21.2) |
| T4 | 7 (21.2) |
| pN stage | |
| N0 | 1 (3.0) |
| N1 | 5 (15.2) |
| N2 | 24 (72.7) |
| N3 | 3 (9.1) |
| pStage | |
| IIIa | 23 (69.7) |
| IIIb | 10 (30.3) |
| Grade | |
| MD | 15 (45.5) |
| PD | 18 (54.5) |
| Resection margin | |
| Negative | 21 (63.6) |
| Closed | 1 (3.0) |
| Positive | 11 (33.3) |
| Lymphovascular invasion | |
| No | 26 (78.8) |
| Yes | 7 (21.2) |
| Perineural invasion | |
| No | 30 (90.9) |
| Yes | 3 (9.1) |
| Extranodal extension | |
| No | 29 (87.9) |
| Yes | 4 (12.1) |
| SOX2 gene amplification | |
| None | 11 (33.3) |
| Low | 18 (54.5) |
| High | 4 (12.2) |
| SOX2 protein expression | |
| Weak | 7 (21.2) |
| Moderate | 18 (54.5) |
| Strong | 8 (24.3) |
| Postoperative chemotherapy | |
| No | 4 (12.2) |
| Yes | 29 (87.8) |
| Total dose, median (range, Gy) | 59.4 (50.4-69) |
| Fraction size, median (range, Gy) | 1.8 (1.8-2) |
ECOG, Eastern Cooperative Oncology Group; MD, moderately differentiated; PD, poorly differentiated.