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Demographic characteristics.
| Total | 169 |
| Age, mean (SD) | 66.5 (12) |
| Sex (%) | |
| M | 74 (43.8) |
| F | 95 (56.2) |
| Tumor location (%) | |
| Right | 106 (62.7) |
| Left | 63 (37.3) |
| Stage (%) | |
| 0 | 4 (2.4) |
| 1 | 35 (20.7) |
| 2 | 8 (4.7) |
| 3 | 25 (14.8) |
| 4 | 97 (57.3) |
| Tumor type (%) | |
| Adenocarcinoma | 136 (80.4) |
| Squamous cell carcinoma | 23 (13.6) |
| Other | 10 (5.9) |
