Table 2. The characteristics of patients in Shanghai Pulmonary Hospital.
| Variables | All patients (n=270) |
|---|---|
| Sex, n (%) | |
| Male | 168 (62.2) |
| Female | 102 (37.8) |
| Age at diagnosis (years), n (%) | |
| ≤65 | 170 (63.1) |
| >65 | 100 (36.9) |
| Location of tumor, n (%) | |
| RUL | 77 (28.5) |
| RML | 20 (7.4) |
| RLL | 48 (17.8) |
| LUL | 84 (31.1) |
| LLL | 25 (9.3) |
| Others | 16 (5.9) |
| Tumor size (cm), n (%) | |
| ≤1 | 33 (12.2) |
| 1–2 | 92 (34.1) |
| 2–3 | 82 (30.4) |
| 3–4 | 42 (15.5) |
| 4–5 | 21 (7.8) |
| Histologic type, n (%) | |
| ADC | 189 (70.0) |
| SCC | 81 (30.0) |
| Tumor grade, n (%) | |
| I | 54 (20.0) |
| II | 172 (63.7) |
| III | 44 (16.3) |
| IV | 0 (0) |
| VPI, n (%) | |
| No | 228 (84.4) |
| Yes | 42 (15.6) |
| Surgical approach, n (%) | |
| Sublobar resection | 69 (25.6) |
| Lobectomy | 188 (69.6) |
| Pneumonectomy | 13 (4.8) |
| Examined lymph nodes, n (%) | |
| ≤9 | 170 (63.1) |
| ≥10 | 100 (36.9) |
RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe; LUL, left upper lobe; LLL, left lower lobe; VPI, visceral pleural invasion; ADC, adenocarcinoma; SCC, squamous cell carcinoma.