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Table 1 Comparison of preoperative patient characteristics and secondary signs between groups A and B

From: Secondary signs on preoperative CT as predictive factors for febrile urinary tract infection after ureteroscopic lithotripsy

Characteristics

Group A (n = 26)

Group B (n = 156)

P-value

Age (yr)

58.58 ± 14.29

57.44 ± 15.26

0.722

Gender (Male/Female)

17/9

102/54

1.000

BMI (kg/m2)

25.43 ± 4.12

24.83 ± 3.72

0.453

HTN

15 (57.7%)

61 (39.1%)

0.088

DM

33 (21.2%)

6 (23.1%)

0.792

CKD

6 (23.1%)

11 (7.1%)

0.020

Previous APN

10 (38.5%)

34 (21.8%)

0.066

Previous stone operation

4 (15.4%)

16 (10.3%)

0.439

Hounsfield unit

1011.08 ± 400.82

1033.44 ± 423.38

0.963

Stone laterality (%)

 Right

10 (38.5%)

80 (51.3%)

 

 Left

12 (46.2%)

69 (44.2%)

 

 Both

4 (15.3%)

7 (4.5%)

 

Stone position (%)

 Upper ureter

16 (61.5%)

71 (45.5%)

 

 Mid ureter

2 (7.7%)

24 (15.4%)

 

 Lower ureter

8 (30.85)

61 (39.1%)

 

Mean number of stones

1.34 ± 0.45

1.38 ± 0.39

0.823

Size (mm)

13.19 ± 8.95

9.41 ± 3.80

0.000

Hydronephrosis

25 (96.2%)

126 (80.8%)

0.053

Hydroureter

25 (96.2%)

92 (58.3%)

0.006

Unilateral enlargement

6 (23.1%)

20 (12.8%)

0.166

 Perinephric fat stranding

23 (88.5%)

69 (44.2%)

< 0.001

 Periureteral fat stranding

22 (84.6%)

91 (58.3%)

0.015

 Tissue rim sign

23 (88.5%)

98 (62.8%)

0.010

  1. BMI Body mass index, HTN Hypertension, DM Diabetes mellitus, CKD Chronic kidney disease, APN Acute pyelonephritis