Metastatic colon cancer and first line treatment with conventional chemotherapy without monoclonal antibody.

Metastatic colon cancer and first line treatment with conventional chemotherapy plus monoclonal antibody

Metastatic colon cancer, first line treatment with conventional chemotherapy

From date of inclusion until the date of death from any cause.

The two main prognostic scores for metastatic colorectal cancer (Kohne and GERCOR) do not account for resectability of liver-only metastasis (LiM) and thus are limited as treatment guidance. We propose a classification of patients based on LiM resectability, performance status (PS) and lactate dehydrogenase (LDH) levels and compare its discrimination capacity against Kohne and GERCOR scores.

GEMCAD score: patients are classified as stage 1 if LiM are considered resectable (<4 nodules and <5 cm diameter) or potentially resectable (>4 and <10 nodules or >5 cm diameter), PS 0-1 and LDH < 1.5 ULN; stage 2 if LiM are not resectable or with extrahepatic spread, PS 0-1 and LDH < 1.5 ULN; stage3 if PS 2 or LDH > 1.5 ULN.

This score, Kohne, and GERCOR scores will be tested for discrimination using Harrel's C index (HCI, higher is better) and calibration using Akaike information criterion (AIC, smaller is better) of progression-free survival (PFS) and overall survival (OS).