Table 2.
Operative data, stone profiles, and clinical outcomes compared between the non-present and present groups.
| Variables | Non-prestent Group |
Prestent Group |
p-value |
|---|---|---|---|
| (n = 86) | (n = 80) | ||
| Operative time (minutes), median (range) | 40 (15–105) | 40 (10–120) | 0.848 |
| Ureteral access sheath size (Fr) | (n = 86) | (n = 73) | <0.001 |
| 11/13 | 59 (68.6%) | 16 (21.9%) | |
| 12/14 | 27 (31.4%) | 57 (78.1%) | |
| Postoperative stent (Fr) | (n = 77) | (n = 64) | 0.091 |
| 6 Fr | 77 (100%) | 61 (95.3%) | |
| 7 Fr | 0 (0%) | 3 (4.7%) | |
| Length of hospital stay (days), median (range) | 1 (1–26) | 1 (1–17) | 0.755 |
| Duration of postoperative stenting (days), median (range) | (n = 73) 22 (1–46) | (n = 62) 18 (1–185) | 0.928 |
| Major stone composition | 0.207 | ||
| Calcium oxalate monohydrate | 29 (34.1%) | 37 (49.3%) | |
| Calcium oxalate dihydrate | 16 (18.8%) | 10 (13.3%) | |
| Calcium phosphate | 32 (37.6%) | 18 (24.0%) | |
| Non-calcium | 8 (9.5%) | 10 (13.4%) | |
| Stone-free rate at 2 weeks | 50 (59.5%) | 58 (73.4%) | 0.087 |
| SFR of lower pole stone | 21 (42.0%) | 25 (43.1%) | 0.876 |
| SFR of non-lower pole stone | 29 (58.0%) | 33 (56.9%) | 0.734 |
| Stone-free rate at 6 months | 65 (79.3%) | 68 (90.7%) | 0.078 |
| SFR of lower pole stone | 29 (44.6%) | 33 (48.5%) | 0.322 |
| SFR of non-lower pole stone | 36 (55.4%) | 35 (51.5%) | 0.395 |
| Increase in SFR from 2 weeks to 6 months | 19.8% | 17.3% | 0.478 |
A p-value <0.05 indicates statistical significance.
Abbreviations: Fr, French size; SFR, stone-free rate.