Figure 6. Survival curves for patients with unresectable hepatocellular carcinoma who were stratified according to the Japan Integrated Staging System.

Score 0 versus 1, P = .322; score 1 versus 2, P = .655; score 2 versus 3, P = .046; score 3 versus 4, P = .000; score 4 versus 5, P = .980. The difference was significant only between scores of 2 and 3 and between scores of 3 and 4.