STAT3 and nonpapillary renal cell carcinoma: As shown in Table 1 and Supplementary Table S24, through a time-dependent concordance index (C-index) analysis using the training set, we found that the combination of gankyrin and STAT3 or CCL24 yielded a higher C-index value for predicting the OS and PFS of ccRCC patients compared with the values obtained with gankyrin, STAT3 or CCL24 alone.