Success (Group 1) Sample size 18

Failure (Group 2) Sample size 6

P value

Duration (minutes)

<0.0001

Mean ± SD

25.56 ± 6.49

40.75 ± 4.95

HU

0.001

Mean ± SD

774.12 ± 212.85

1193.12 ± 327.51

Size (mm)

0.004

Mean ± SD

9 ± 2.1

12.5 ± 3.3

Hydronephrosis (grade 0/1/2/3)

0/3/13/2

0/0/1/5

0.001