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Table 2 Relationship between various simplified nuclear grading systems and cancer specific survival

From: Reclassification of the Fuhrman grading system in renal cell carcinoma-does it make a difference?

Variable Numbers Univariate analysis Multivariate analysis  
   p-value p-value HR
Nuclear grade (1/2/3/4) 25/86/97/29 0.005   
Grading system 1 ((1+2)/(3+4)) 111/126 0.008   
Grading system 2 ((1/(2+3+4)) 25/212 0.237   
Grading system 3 ((1+2+3)/4) 208/29 0.002   
Grading system 4 (1/2/(3+4)) 25/86/126 0.029   
Grading system 5 ((1+2)/3/4) 111/97/29 0.002 0.001 2.17 (1.37-3.43)