Table 2.

Outcome data for both primary and deferred ureteroscopy (URS) groups

	Primary URS (N = 81)	Deferred URS (N = 69)	p Value
Efficacy  % initial SFR  Median hospital   stays in days (IQR)  Median maneuvers till clearance (range)  % normal renal function (at 3-month follow-up)	75.3 3 (3,4) 1 (1–5) 97.5	87 5 (5,6) 2 (2–3) 94.2	0.097 <0.001 <0.001 0.414
Safety  % Overall complications   *% Ureteral perforation/ pyelonephritis   *% post-operative transient hematuria   *% post-operative ureteral stricture	9.9 6.2 4.9 2.5	2.9 0 2.9 0	0.109 0.043 0.090 0.500
Median EGP cost (IQR)	3200 (3200, 3450)	4450 (4280, 4740)	<0.001

IQR – inter-quartile range