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| Variable | URS | No URS | P value |
|---|---|---|---|
| No. patients | 15 | 135 | – |
| Stone size (mm) | 10.5±8.2 | 6.8±2.2 | 0.001 |
| SSD (mm) | 88.5±21.3 | 96.2±14.5 | 0.124 |
| HU | 919.7±282.8 | 651.9±256.6 | 0.001 |
| Location | 0.381 | ||
| Proximal | 10 (66.7) | 72 (53.3) | |
| Mid | 1 (6.7) | 4 (3.0) | |
| Distal | 4 (26.6) | 59 (43.7) |
Values are presented as mean ± SD and/or frequency (%) appropriate. URS, ureteroscopy; SSD, skin-to-stone distance; HU, Hounsfield units; ESWL, extracorporeal shock wave lithotripsy.
