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. 2015 Sep-Oct;41(5):920–926. doi: 10.1590/S1677-5538.IBJU.2014.0402

Table 2. Analysis of renal function after ureteroscopy and intracorporeal lithotripsy for intrarenal stones.

		Preoperative	Postoperative	p
CKD group, n (%)
	GFR>60 mL/min/1.73m²	128 (78.5%)	141 (86.5%)	0.003
	45≤GFR<59 mL/min/1.73m²	27 (16.6%)	14 (8.6%)	0.018
	30≤GFR<45 mL/min/1.73m²	7 (4.3%)	8 (4.9%)	0.529
	15≤GFR<30 mL/min/1.73m²	1 (0.6%)	0 (0%)	0.319
	GFR<15 mL/min/1.73m²	0 (0%)	0 (0%)	1
Change to a worse CKD group			8 (4.9%)
Change to a better CKD group			23 (14.1%)
Mean GFR (mL/min/1.73m²)		84.30±26.2	84.90±24.4	0.675