Table 1 Comparison of pre-operative values
From: Efficacy and safety of mini percutaneous nephrolithotomy in obese patients
Body Mass Index | p values | ||||
|---|---|---|---|---|---|
<30 | ≥30 | ||||
% | % | ||||
Number of patients | 133 | 49 | |||
Sex | 0.004 | ||||
Male | 91 | 68.4 | 22 | 44.9 | |
Female | 42 | 31.6 | 27 | 55.1 | |
Mean age (years) | 41.8 ± 12.6 (18–78) | 51.7 ± 12.5 (19–76) | <0.001 | ||
Mean Body Mass Index (kg/m2) | 25.5 ± 4.3 (17.8–29.8) | 34.3 ± 4.3 (30.0–46.4) | <0.001 | ||
Mean stone size (mm) | 23.9 ± 9.0 (5–60) | 26.2 ± 8.6 (15–60) | 0.134 | ||
Localization of stones | |||||
Multiple calyces | 67 | 50.4 | 27 | 55.1 | |
Pelvis | 25 | 18.8 | 8 | 16.3 | |
Lower calyces | 29 | 21.8 | 12 | 24.5 | |
Middle calyces | 7 | 5.3 | 0 | 0 | |
Upper calyces | 5 | 3.8 | 2 | 4.1 | |
Side of the operated kidney | |||||
Left | 72 | 54.1 | 30 | 61.2 | |
Right | 61 | 45.9 | 19 | 38.8 | |
Grade of hydronephrosis | 0.802 | ||||
0 | 4 | 3 | 1 | 2.1 | |
1 | 76 | 57.6 | 31 | 64.6 | |
2 | 44 | 33.3 | 15 | 31.3 | |
3 | 7 | 5.3 | 1 | 2.1 | |
4 | 1 | 0.8 | 0 | 0 | |
Opacity | 0.050 | ||||
Non-opaque | 3 | 2.3 | 4 | 8.2 | |
Opaque | 129 | 97 | 43 | 87.8 | |
Semi-opaque | 1 | 0.8 | 2 | 4.1 | |
Previous ESWL history | 29 | 23.6 | 17 | 37.0 | 0.082 |
Previous PNL history | 46 | 37.1 | 20 | 46.5 | 0.277 |
Previous open surgery history | 26 | 21 | 8 | 17.8 | 0.648 |