Summary of Criteria of Previously Proposed Prognostic Scoring Systems
| Prognostic score | Prognostic variable |
| Memorial Sloan-Kettering Cancer Center clinical risk score (Fong et al. (6)) | Node-positive primary tumor |
| Disease-free interval from primary tumor | |
| Number of liver metastases | |
| Preoperative CEA level | |
| Diameter of largest tumor | |
| Pittsburgh system (Iwatsuki et al. (7)) | Bilobar tumors |
| Disease-free interval from primary tumor | |
| Number of liver metastases | |
| Diameter of largest tumor | |
| Extrahepatic metastatic disease | |
| Positive surgical margins | |
| Nordlinger score (Nordlinger et al. (8)) | Age |
| Diameter of largest tumor | |
| Extension of primary cancer to serosa | |
| Node-positive primary tumor | |
| Disease-free interval from primary tumor | |
| Surgical margin | |
| Basingstoke index (Rees et al. (9)) | Node-positive primary tumor |
| Differentiation of primary tumor | |
| Number of liver metastases | |
| Preoperative carcinoembryonic antigen level | |
| Diameter of largest tumor | |
| Extrahepatic metastatic disease | |
| Hepatic resection margins |