Table 2.
Stone parameters and operative findings
| Group 1 (n=114, 55.3%) | Group 2 (n=92, 44.6%) | p value | |
|---|---|---|---|
| Mean stone size (mm2) | 177.2±105.2 (60–581) | 155.6±103.3 (60–580) | 0.03 |
| Stone number (n) | |||
| Single | 81 (71%) | 59 (64.1%) | 0.06 |
| 2 | 27 (23.7%) | 21 (22.8%) | |
| ≥3 | 6 (5.3%) | 12 (13.1%) | |
| Stone localization | |||
| Upper Calyx | 9 (8.9%) | 11 (8.1%) | 0.22 |
| Middle Calyx | 3 (3%) | 13 (9.6%) | |
| Lower Calyx | 53 (52.5%) | 62 (45.9%) | |
| Pelvic | 13 (12.9%) | 24 (17.8%) | |
| Multiple | 23 (22.8%) | 25 (18.5%) | |
| Mean fluoroscopy time (min) | 1.6±0.9 (range:0.3–4.0) | 1.5±0.8 (range:0.3–4.0) | 0.69 |
| Mean operative time (min) | 60.9 23.7 (range:20–145) | 54.4±16.4 (range:20–145) | 0.12 |
| Length of hospitalization (hours) | 31.1±39.2 (range:16–192) | 29.9±37.4 (range:17–120) | 0.71 |
| Success | |||
| Stone free | 94 (82.5%) | 80 (86.9%) | 0.38 |
| Residual stone | 20 (17.5%) | 12 (13.1%) | |
| Complication | |||
| Overall | 7 | 2 | 0.3 |
| Fever | 3 | 0 | |
| Steinstrasse | 2 | 1 | |
| Transient increase in creatinine levels | 0 | 1 | |
| Urosepsis | 2 | 0 |