Fig. 2

A Overall survival and B recurrence-free survival of patients stratified by preoperative serum levels of α-fetoprotein (AFP) and carbohydrate antigen 19-9 (CA19-9). Group 1: n = 294, green curve; group 2: n = 258, yellow curve; group 3: n = 87, blue curve; group 4: n = 72, red curve. A P1–2 < 0.001, P2–3 = 0.601, P1–3 = 0.001, P3–4 < 0.001, P1–4 < 0.001, P2–4 = 0.018); B P1–2 = 0.02, P2–3 = 0.334 P1–3 = 0.005, P3–4 = 0.138, P1–4 < 0.001, P2–4 = 0.01