KRT8 and nonpapillary renal cell carcinoma: The Cox proportional hazards regression analysis results indicated that KRT8 expression levels were an independent risk factor for PFS (hazard ratio [HR] 2.918, 95 % confidence interval [CI] 1.342–6.345, p=0.007) and OS (HR 3.512, 95 % CI 1.391-8.867, p=0.008) in patients with ccRCC after partial or radical nephrectomy (Table 2).