One-stage efficacy of single tract minimally invasive ECIRS in the improved prone frog split-leg position for staghorn stones

Table 2 Operation-related parameters

Characteristic	stmECIRS	stmPNL	P value
Operative time (min)	105.0 (85.0, 124.0)^b	99.0 (75.8, 150.3)^b	0.996^a
Hb drop (g/dL)	2.4 (1.7, 3.1)^b	2.1 (1.5, 2.7)^b	0.353^a
Scr up (umol/L)	− 2.46 ± 8.97	− 1.89 ± 12.80	0.814
Hospitalization time (d)	10.0 (8.0, 13.0)^b	11.5 (10.0, 14.1)^b	0.082^a
One-stage stone free (%)	38 (84.4)	22 (57.9)	0.007
Complications			0.345
Fever (> 38.5 ℃) (%)	1 (2.2)	0	1.0^c
Hemorrhage (%)	4 (8.9)	7 (18.4%)	0.202
Blood transfusion (%)	2 (4.4)	2 (5.3)	0.862
Clavien grade
0 (%)	40 (88.9)	31 (81.6)	0.345
I (%)	3 (6.7)	5 (13.1)	0.318
II (%)	2 (4.4)	2 (5.3)	0.862
≥ III (%)	0	0

StmPNL Group: single tract minimally invasive percutaneous nephroscopy in prone position was performed for the patients in the prone position
StmECIRS Group: single tract minimally invasive endoscopic combined intrarenal surgery was performed in the improved prone frog split-leg position
Hb: Hemoglobin; Scr: serum creatinine
^aMann–Whitney U test was used when normal distribution was not obeyed
^bNon-normally distributed continuous variables were represented by the median (quartile)
^cSince the data frequency contains “0”, the result of Fisher's Exact Test in the Chi-square Test was used

ISSN: 1471-2490