Table .

Characteristics of patients operated by attending and fellows

	Attending (n = 20)	Fellows (n = 80)	p
Sex (%)			0.56
Female	9 (45)	37 (46.3)
Male	11 (55)	45 (53.7)
Age, median* (IQR)	59.5 (30 – 104)	87.5 (30 – 142)	0.09
Side n (%)			1
Left	14 (70)	56 (70)
Right	6 (30)	24 (30)
Etiology of UPJO (%)
Intrinsic obstruction	3 (15)	30 (37.5)	0.07
Crossing vessel	8 (40)	40 (50)	0.46
Fibroepithelial polyp	6 (30)	10 (12.5)	0.08
Failed open pyeloplasty	3 (15)	0 (0)	0.007
Antegrade Stent (%)			<0.001
No	12 (60)	9 (11.25)
Yes	8 (40)	71 (88.75)
Follow-up, median* (IQR)	23.5 (23 – 24)	24 (22 – 25)	0.97

^*Age of patients is in months.