Table 1.
Patients characteristics
| n | % | |
|---|---|---|
| Sex | ||
| Women | 193 | 42.6 |
| Men | 260 | 57.4 |
| Age | ||
| Mean ± SD | 68.1 ± 9.5 | |
| Smoking status | ||
| Never smoker | 179 | 59.5 |
| Smoker | 274 | 60.5 |
| Surgical procedure | ||
| ≥Lobectomy | 388 | 85.7 |
| ≤Segmentectomy | 65 | 14.3 |
| Pathological stage | ||
| I | 322 | 71.1 |
| II | 60 | 13.2 |
| III | 71 | 15.7 |
| T factor | ||
| T1 | 218 | 48.1 |
| T2 | 194 | 42.8 |
| T3 | 39 | 8.6 |
| T4 | 2 | 0.4 |
| N factor | ||
| N0 | 348 | 76.8 |
| N1 | 42 | 9.3 |
| N2 | 63 | 13.9 |
| Histology | ||
| AC | 328 | 72.4 |
| SQ | 107 | 23.6 |
| Others | 18 | 4.0 |
| MDM2 SNP309 | ||
| TT | 94 | 20.8 |
| TG | 220 | 48.6 |
| GG | 139 | 30.7 |
| Adjuvant chemotherapy | 123 | 27.2 |
| Chemotherapy (postrecurrence) | 69 | 15.2 |
| Radiation therapy (postrecurrence) | 51 | 11.3 |
Patients who had undergone preoperative therapies (chemotherapy and/or radiation therapy) and had a history of lung cancer were excluded. AC, adenocarcinoma; SQ, squamous cell carcinoma.