Table 3 Risk factors for fUTI following URSL performed after obstructive pyelonephritis treatment

Gender

 Male

1

 Female

1.66

0.78–3.53

Pre-URSL sepsis

 No

1

1

 Yes

2.75

1.29–5.86

2.08

0.89–4.83

Stone position

 Ureter

1

 Renal

3.94

1.83–8.51

2.91

1.29–6.58

Maximal Hounsfield unit value (HU)^b

  < 750

1

1

  ≥ 750

2.79

1.13–6.87

1.15

0.49–2.68

Period from antipyresis to URSL (days)^b

  < 20

1

  ≥ 20

2.23

1.02–4.86

Pre-URSL ureteral stent placement period (days)^b

  < 21

1

1

  ≥ 21

4.22

1.65–10.8

2.77

1.12–6.8

Operation time (min)^b

  < 75

1

1

  ≥ 75

6.75

3.05–14.9

3.37

1.45–7.84

Using access sheath during URSL

 No

1

 Yes

2.39

0.99–5.78