Table 1.
All patient characteristics (n=574).
| Characteristics | n (%) |
|---|---|
| Age | |
| ≤60 | 336 (58.5) |
| >60 | 238 (41.5) |
| Sex | |
| Male | 267 (46.5) |
| Female | 307 (53.5) |
| Smoking history | |
| Former/current smoker | 275 (47.9) |
| Never smoker | 291 (50.7) |
| Pathological stage | |
| I | 288 (50.2) |
| II | 92 (16) |
| IIIA | 178 (31) |
| IIIB | 16 (2.8) |
| Tumor size | |
| ≤3 cm | 348 (60.6) |
| >3 cm | 226 (39.4) |
| Regional LN metastasis | |
| No | 342 (59.6) |
| Yes | 232 (40.4) |
| Surgical resection | |
| Pneumonectomy | 36 (6.3) |
| Lobectomy | 517 (90.1) |
| Wedge resection | 17 (3.0) |
| Adjuvant treatment | |
| No | 298 (51.9) |
| Yes | 276 (48.1) |
| CEA | |
| ≤5.0 ng/ml | 364 (63.4) |
| >5.0 ng/ml | 208 (36.2) |
| SCCA | |
| ≤1.5 ng/ml | 525 (91.5) |
| >1.5 ng/ml | 47 (8.2) |
| Cyfra21–1 | |
| ≤3.3 ng/ml | 382 (66.6) |
| >3.3 ng/ml | 190 (33.1) |
| NSE | |
| ≤15.2 ng/ml | 451 (78.6) |
| >15.2 ng/ml | 120 (20.9) |
LN – lymph node; CEA – carcinoembryonic antigen; Cyfra21-1 – cytokeratin-19 fragments; SCCA – squamous cell carcinoma antigen; NSE – neuron-specific enolase.