Clinicopathological variables for the patient cohort (n=427)
| Age | |
| Median | 57.0 |
| Range (IQR) | 47.0–68.0 |
| Gender | |
| Male | 225 (52.7) |
| Female | 202 (47.3) |
| Status | |
| Alive | 328 (76.8) |
| Dead | 96 (22.5) |
| Unknown | 3 (0.7) |
| Histological grade | |
| Well differentiated | 42 (9.8) |
| Moderately differentiated | 324 (75.9) |
| Poorly differentiated | 51 (11.9) |
| Unknown | 10 (2.3) |
| Tumour site | |
| Left | 345 (80.8) |
| Right | 77 (18.0) |
| Unknown | 5 (1.2) |
| Tumour, node, metastases stage | |
| I | 50 (11.7) |
| II | 149 (34.9) |
| III | 161 (37.7) |
| IV | 49 (11.5) |
| Unknown | 18 (4.2) |