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Table 4 The SWL outcome (case %) according to body mass index (BMI) and comparisons (Chi square p values) among these groups

From: Has the pelvic renal stone position inside the upper loop of JJ stent any influence on the extracorporeal shock wave lithotripsy results?

SWL outcome

Case %

p values

OB

OV

N

All

OB versus OV

OB versus N

OB versus OV + N

N versus OV

N versus OB + OV

SF after 1st SWL

0

0

12.3

8.0

0.797

0.977

0.023

0.006

SF after 2nd SWL

0

6.0

23.6

17.3

0.732

0.398

0.555

0.014

0.007

SF after 3rd SWL

0

2.0

24.5

16.7

0.200

0.375

0.577

0.030

0.001

Overall stone free

0

8.0

60.4

42.0

0.905

0.013

0.035

0.001

0.001

Residual fragments

0

32.0

32.1

30.9

0.246

0.228

0.223

0.862

0.779

Stone not fragmented

10

60.0

7.5

27.1

0.139

0.001

0.001

0.001

0.001

  1. Values in italics for p < 0.05
  2. OB obese (BMI >30), OV overweight (BMI 25–30), N normal weight (BMI 18.5–25), SF stone-free