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(A) Age (≥ 65 vs. <65 years; P=0.4375); (B) Sex (male vs. female; P=0.920); (C) Tumor grade (grade 1-2 vs. 3-4; P=0.032); (D) Tumor stage (stage 3-4 vs. 1-2; P=0.005); (E) Alpha-fetoprotein(AFP) (≤20 vs. >20 ng/ml; P=0.291). (F) Vascular invasion (none vs. micro vs. macro; P=0.030).
