Table 1 Patients characteristics between DJ group and EUP group

Sex (Male/Female)

409/89

33/4

0.385

Age (m)

53.3 [22.7;95.2]

24.6 [17.4;48.9]

0.004

Weight (kg)

18.0 [12.4;26.0]

13.0 [11.0;17.3]

< 0.001

Kidney malformation (Y/N)

10/488

3/34

0.054

Preoperative presentation (Y/N)

225/273

5/32

< 0.001

Abdominal surgery history (Y/N)

11/487

0/37

1.000

Operation side (L/R)

387/111

26/11

0.402

Surgeon (Chief/Associate chief)

168/329

12/25

1.000

Preoperative APD (cm)

2.80 [2.20;3.60]

3.40 [2.50;4.40]

0.003

Obstruction reason

0.641

    UPJ stenosis

432 (86.7%)

31 (83.8%)

    Ectopic vascular

29 (5.82%)

2 (5.41%)

    Others

37 (7.43%)

4 (10.8%)

Operation time (min)

110 [83.0;139]

113 [100;158]

0.020

Length of stay (d)

6.00 [6.00;7.00]

9.00 [8.00;11.0]

< 0.001

Complications (Y/N)

62/436

12/25

0.002

Recurrent UPJO (Y/N)

9/489

1/36

0.515

Postoperative UVJO (Y/N)

1/497

4/33

< 0.001

Post-operatively APD(cm)

    3 months

2.20 [1.50;2.88]

3.50 [3.02;4.58]

0.027

    6 months

1.60 [1.15;2.20]

1.95 [1.42;2.45]

0.179

    12 months

1.60 [1.17;2.10]

1.85 [1.33;2.70]

0.092

    18 months

1.70 [1.35;2.25]

1.90 [1.50;3.30]

0.509

    24 months

1.60 [1.15;2.15]

1.75 [1.37;2.80]

0.195