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Table 3 The comparison of one session stone free rate (SFR) and estimated OR for non-one session stone free

From: High stone-free rate immediately after suctioning flexible ureteroscopy with Intelligent pressure-control in treating upper urinary tract calculi

Variables

One session stone free

p-value

Multivariate analysis

Yes (n = 250)

No (n = 60)

aOR (95%CI)

Demography

Age

50 (42.00–59.00)

46.5 (35.50–58.00)

0.176

Gender

  

0.525

 Male

161 (81.73)

36 (18.27)

  

 Female

89 (78.76)

24 (21.24)

  

 BMI

24.81 (22.86–26.99)

24.42 (22.90–26.93)

0.634

Stent in ureter

  

0.320

 Yes

47 (85.45)

8 (14.55)

  

 No

203 (79.61)

52 (20.39)

  

Infection

  

0.105

 Yes

188 (78.66)

51 (21.34)

  

 No

62 (87.32)

9 (12.68)

  

Disease history

Stone

  

< 0.001

2.39 (1.21, 4.73)

 Yes

73 (69.52)

32 (30.48)

  

 No

177 (86.34)

28 (13.66)

  

Other kidney diseases

  

0.770a

 Yes

15 (78.95)

4 (21.05)

  

 No

235 (80.76)

56 (19.24)

  

DM

  

0.363

 Yes

41 (85.42)

7 (14.58)

  

 No

209 (79.77)

53 (20.23)

  

Hypertension

  

0.597

 Yes

71 (82.56)

15 (17.44)

  

 No

179 (79.91)

45 (20.09)

  

Medicine user and weakness

  

0.847

-

 Yes

27 (79.41)

7 (20.59)

  

 No

223 (80.8)

53 (19.2)

  

Operation

Operation time

75 (60.0–105.0)

99 (70.0–144.0)

< 0.001

1.01 (1.00, 1.01)

Stone number

  

< 0.001

 

 Single

133 (93.66)

9 (6.34)

 

1

 Multiple

117 (69.64)

51 (30.36)

 

1.11 (0.34, 3.60)

Stone size(mm)

  

< 0.001

 

 < 20

130 (91.55)

12 (8.45)

 

1

 20–29

77 (82.80)

16 (17.20)

 

1.34 (0.54, 3.36)

 30–39

26 (72.22)

10 (27.78)

 

1.67 (0.53, 5.26)

 40–49

7 (41.18)

10 (58.82)

 

4.37 (1.16, 16.45)

 ≥ 50

10 (45.45)

12 (54.55)

 

2.41 (0.58, 9.96)

Composition

  

0.368

 

 Calcium oxalate

55 (78.57)

15 (21.43)

 

 Calcium phosphate

18 (78.26)

5 (21.74)

 

 Uric acid and magnesium ammonium phosphate

12 (100.00)

0 (0.00)

 

 Complex

165 (80.49)

40 (19.51)

 

Hydronephrosis

  

0.806

 

 Grade 0

38 (80.85)

9 (19.15)

 

 Grade I

97 (80.83)

23 (19.17)

 

 Grade II

87 (82.86)

18 (17.14)

 

 Grade III

26 (74.29)

9 (25.71)

 

 Grade VI

2 (66.67)

1 (33.33)

 

CT value (ml)

  

0.06

 

 ≤ 1000

181 (83.41)

36 (16.59)

 

1

 > 1000

69 (74.19)

24 (25.81)

 

1.22 (0.59, 2.52)

Guy’s stone score

  

<0.001a

 

 Grade I

158 (93.49)

11 (6.51)

 

1

 Grade II

81 (71.05)

33 (28.95)

 

3.54 (1.18, 10.59)

 Grade III

8 (40.00)

12 (60.00)

 

10.95 (2.65, 45.25)

 Grade VI

3 (42.86)

4 (57.14)

 

2.18 (0.23, 21.21)

  1. The significance of bold values were p < 0.05
  2. SFR stone free rate, aOR adjusted Odds ratio, BMI body mass index, DM diabetes mellitus; CT computer tomography
  3. Continuous data without normal distribution are presented as median (interquartile) and performed by Wilcoxon rank; Categorical data are presented as n (%) and performed by the Chi-squared test or aFisher’s exact test, as appropriate