NARF and nonpapillary renal cell carcinoma: Following the selection of 8 lncRNA as model genes, the risk score was determined in the manner described below for ccRCC patients: LINC01711 × (0.0037830) + LINC01694 × (0.2212711) + NARF-IT1 × (0.0051376) + SMARCA5-AS1 × (− 0.0281499) + LINC00565 × (0.0569755) + AC121338.2 × (− 0.0822645) + SNHG29 × (− 0.0001535) + AL592494.1 × (0.7739774).