Table 1. Association of changing ratio of eGFR and serum UA with pathologic characteristics.

		|ΔeGFR|* < |-20%|	|ΔeGFR|* > |-20%|		|ΔUA|* < 10%	|ΔUA|* > 10%
Grade	Grade 1	7	2	P = 0.0483	7	2	P = 0.1492
	Grade 2	11	18		16	13
	Grade 3	13	38		19	32
pT	pT1/2	14	8	P = 0.0412	14	8	P = 0.1353
	pT3/4	17	50		28	39
Vascular invasion	v0	4	7	P = 0.9707	7	4	P = 0.4092
	v1	27	51		35	43
Metastasis	M0	19	6	P < 0.0001	22	3	P < 0.0001
	M1	12	52		19	45
$$\text{Decreased ratio of eGFR}{\left(\text{eGFR}\right)}^{*}=\frac{\text{preoperative}-\text{postoperative serum level}}{\text{preoperative serum level}}\text{×}100(\%)$$
$$\text{Increased ratio of serum UA}{\left(\text{UA}\right)}^{*}=\frac{\text{preoperative}-\text{postoperative serum level}}{\text{preoperative serum level}}\text{×}100(\%)$$