Table 1.
Preoperative characteristics of the patients, and renal stones
| Group 1 (n: 849) | Group 2 (n: 883) | Group 3 (n: 334) | Group 4 (n: 36) | p -value | |
|---|---|---|---|---|---|
| Mean age (years) | 38.19±14.8 | 46.39±12.9 | 49.52±12.8 | 50.22±11.1 | 0.001 |
| Gender | |||||
| Male | 490 | 510 | 217 | 20 | |
| Female | 359 | 373 | 117 | 16 | 0.102 |
| ASA score | |||||
| I | 378 | 412 | 141 | 16 | |
| II | 256 | 266 | 110 | 10 | 0.896 |
| III | 173 | 157 | 63 | 8 | |
| IV | 42 | 48 | 20 | 2 | |
| Number of stones | |||||
| Single | 375 | 392 | 121 | 15 | 0.059 |
| Multiple | 474 | 491 | 213 | 21 | |
| Stone size (mm2) | 7.6±5.70 | 7.84±5.56 | 8.17±6.00 | 8.15±5.92 | 0.124 |
| Staghorn stone frequency (%) (partial or complete) | 53 | 48 | 52 | 57 | 0.920 |
| Previous SWL | 25.3% | 26.7% | 25.0% | 22.2% | 0.840 |
ASA score: American Society of Anesthesiologists; SWL: shock wave lithotripsy