Fig 2. Survival according to a clinical risk score including sidedness, nodal positivity and extrahepatic disease.

(A) Overall survival (n = 258; missing = 1; p = 0.005) and (B) disease-free survival (n = 257; missing = 2; p = 0.027) in own cohort of patients undergoing curative-intent liver resection for colorectal liver metastases. Each factor (right-sided primary-tumour, positive lymph-nodes and extrahepatic disease) was accounted for one point in this score). (C) Overall survival (n = 517; missing = 10; p = 0.001) and (D) disease-free survival (n = 517; missing = 10; p = 0.011) in the international validation cohort.