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Fig. 5 —Curves indicate cancer-free survival in three groups with different
histologic grades after radiofrequency ablation. Cancer-free survival rates at
1, 2, 3, and 4 years were 74%, 44%, 39%, and 39%, respectively, for group 1;
53%, 23%, 13%, and 10%, respectively, for group 2; and 57%, 29%, 14%, and 0%,
respectively, for group 3. Four-year cancer-free survival rate showed a trend
to decrease with increasing histologic grade of hepatocellular carcinoma
(p < 0.05 for groups 1 vs 2; p > 0.05 for groups 1 vs
3 and groups 2 vs 3 by Bonferroni correction). Number of patients followed up
at 1, 2, 3, and 4 years was 25, 10, four, and two, respectively, in group 1;
24, seven, four, and two, respectively, in group 2; and four, two, one, and
one, respectively, in group 3.
