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Table 2 Baseline characteristics of patients whose stones were located 31–90 mm from the UPJ

From: Cost-effectiveness of anti-retropulsive devices varies according to the locations of proximal ureteral stones: a retrospective cohort study

  Type of procedure p value
URS URS + ARD
All patients. no 72 67  
Gender, no. Male/Female 48/24 53/14 0.128
Age, years, mean ± SD,
median [range]
52.0 ± 15.1, 51
[27–88]
47.5 ± 12.9, 48
[22–76]
0.065
BMI, mean ± SD,
median [range]
24.9 ± 3.1, 24.9
[17.6–33.0]
25.3 ± 4.4, 24.5
[14.2–37.3]
0.589
Hydronephrosis grade, no. Mild/Moderate/Severe 45/17/10 31/28/8 0.070
Stone laterality (L/R), no 10/15 6/8 1.000
Stone size, mean ± SD
median [range]
   
 Length (mm) 10.3 ± 3.4, 10
[5–25]
12.5 ± 5.5, 11
[5–36]
0.006
 Width (mm) 6.8 ± 2.0, 7
[3–15]
7.4 ± 2.1, 7
[4–11]
0.101
 Burden (mm2) 58.0 ± 33.4, 51.8
[14.1–212.0]
78.3 ± 54.3, 64.4
[15.7–310.9]
0.010
 Density (HU) 1207.2 ± 307.8, 1239
[420–1815]
1239.8 ± 319.7, 1323
[451–1738]
0.617
Operation time (min),
mean ± SD, median [range]
40.2 ± 18.4, 35.5
[10–84]
44.5 ± 27.8, 36.5
[14–150]
0.304
Intraoperation complications 0 0
Postoperative stay (days),
mean ± SD, median [range]
4.3 ± 1.3, 4
[1–8]
4.2 ± 2.1, 4
[2–13]
0.710
Post-fever, no 3 3 1.000
Post-sepsis, no 3 1 0.621
Total expense (¥),
mean ± SD, median [range]
20,303.1 ± 5832.4, 20,071.3
[10040.0 ± 45,145.0]
26,204.7 ± 12,106.7, 24,280.1
[5912.0 ± 87,707.0]
0.001
SFR (%)    
 One-day 84.7 89.6 0.455
 One-month 84.7 95.5 0.047
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