SPAG9 and nonpapillary renal cell carcinoma: The univariate Cox analysis showed that age (HR = 1.029, 95% CI = 1.016~1.043), pathological grade (HR = 2.286, 95% CI = 1.862~2.807), and clinical stage (HR = 1.897, 95% CI = 1.660~2.167) were risk factors for OS in ccRCC patients, and that SPAG9 expression (HR = 0.939, 95% CI = 0.909~0.971) was a protective factor.