Supplementary Materials: The following are available online at 10.5281/zenodo.3479768, Figure S1: Dysregulation of candidate lncRNAs in HCCs. Expression levels of the indicated lncRNAs were detected in 20 paired HCC and adjacent non-tumor liver tissues by qPCR analysis. Figure S2: The performance of classifiers with different number of lncRNAs in predicting recurrence within 1 year after hepatectomy in the training set. Figure S3: Performance of the original and discredited expression data of 20 dysregulated lncRNAs in predicting recurrence within 1 year after hepatectomy in the training set. Table S1: The association between lncRNA level and early recurrence. Table S2: The predicted power of Clnc in the subgroups of patients in the training cohort. Table S3: Univariate and multivariate Cox regression analyses of factors associated with 5-year recurrence-free survival for patients in the training and test sets. Table S4: The candidate lncRNAs selected from microarray (GSE54238) and their abundance. Table S5: The candidate lncRNAs selected from published papers. Table S6: Sequence of primers.