Table 3.
Threshold values for dichotomising patients in survival analysis
| Parameters | Group 0 | Group 1 |
| Sex | Female | Male |
| Age at diagnosis | ≤64 years | >64 years |
| Site of primary cancer | Rest of colon | Rectum |
| Haemoglobin | ≤11 | >11 |
| White cell count | ≤10 | >10 |
| Platelets | ≤400 | >400 |
| ALP | ≤300 | >300 |
| LDH | <Laboratory upper limit | >Laboratory upper limit |
| CEA | ≤13 | >13 |
| Number of liver metastases | 1 or 2 | >2 |
| Metastases diameter (mm) | ≤15.17 | >15.17 |
| Received metastatectomy or RFA | No | Yes |
| Response to chemotherapy | PD or SD | PR or CR |
ALP, alkaline phosphatase; CEA, carcionembryonic antigen; CR, complete response; LDH, lactate dehydrogenase; PD, progressive disease; PR, partial response; RFA, radiofrequency, ablation; SD, stable disease.
Threshold values for site of primary cancer, haemoglobin, white cell count, platelets and ALP were chosen according to previously published values. Median values were used for age at diagnosis, CEA levels, number of liver metastases and metastases diameter. Laboratory upper limit is used for LDH.