Table 4.
The SWL outcome (case %) according to body mass index (BMI) and comparisons (Chi square p values) among these groups
| 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 |
Values in italics for p < 0.05
OB obese (BMI >30), OV overweight (BMI 25–30), N normal weight (BMI 18.5–25), SF stone-free