Figure 3. Stratified analysis of overall survival in the TCGA and GSE14520 datasets by forestplot. (A) Univariate (left) and multivariate (right) Cox regression analysis of the training group (TCGA). (B) Univariate (left) and multivariate (right) Cox regression analysis of the validation group (GSE14520); TCGA: The Cancer Genome Atlas; HR, hazard ratio; 95% CI, 95% confidence interval; AFP, α-fetoprotein; ALT, alanine aminotransferase; HCC, hepatocellular carcinoma.