Table 2.
Patterns of distant metastasis in the model development cohort and validation cohort. *
| Patterns of distant metastasis | Model development cohort | Validation cohort | Total |
|---|---|---|---|
| Lung | 47 (5.9%) | 26 (6.6%) | 73 (6.1%) |
| Mediastinal LNM | 18 (2.5%) | 7 (1.8%) | 25 (2.1%) |
| Para-aortic LNM | 26 (3.3%) | 12 (3.0%) | 38 (3.2%) |
| Supraclavicular LNM | 15 (1.9%) | 8 (2.0%) | 23 (1.9%) |
| Liver | 14 (1.8%) | 7 (1.8%) | 21 (1.8%) |
| Bone | 11 (1.4%) | 7 (1.7%) | 18 (1.5%) |
| Others | 6 (0.8%) | 5 (1.3%) | 11 (0.9%) |
| Total | 110 (13.8%) | 55 (13.8%) | 165 (13.8%) |
*Some patients suffered more than one distant metastatic sites at the same time.