Multivariable models
| Covariate | HR (95% CI) | p-value |
| Excluding patients with stage IV cancer | ||
| Age (ref.: ≥70 years) | 0.49 (0.38–0.63) | <0.0001 |
| Stage I (ref.: stage III) | 0.41 (0.29–0.59) | <0.0001 |
| Stage II (ref.: stage III) | 0.57 (0.37–0.86) | |
| Tumour size | 1.06 (1.01–1.11) | 0.02 |
| No surgical treatment | 3.14 (2.14–4.61) | <0.0001 |
| SUV (ref.: low) | 1.58 (1.27–1.96) | <0.0001 |
| Including patients with stage IV cancer | ||
| Age (ref.: ≥70 years) | 0.65 (0.55–0.78) | <0.0001 |
| Stage I (ref.: stage IV) | 0.21 (0.14–0.31) | <0.0001 |
| Stage II (ref.: stage IV) | 0.31 (0.20–0.48) | |
| Stage III (ref.: stage IV) | 0.48 (0.37–0.62) | |
| No surgical treatment | 2.45 (1.93–3.11) | <0.0001 |
| SUV (ref.: low) | 1.35 (1.15–1.58) | 0.0002 |
Ref.: reference; SUV: standardised uptake value.