Table 1 Comparison between patients with stone impaction and patients without according to stone size regarding the clinical and outcome parameters
All patients N = 154 | Impacted n = 74 | Non impacted n = 80 | p | |
|---|---|---|---|---|
Age (years) mean ± SD | 37.0 ± 8.9 | 38.7 ± 8.1 | 36.5 ± 8.4 | 0.05 |
Male/female n | 86/48 | 39/35 | 47/33 | 0.24 |
BMI (kg/m2) | 29.5 ± 3.5 | 29.5 ± 3.5 | 29.4 ± 3.3 | 0.91 |
Previous URSL n (%) | 47 (30.5) | 23 (31.1) | 24 (30) | 0.82 |
Duration of symptoms (days) median (range) | 29 (13.0–152.0) | 32 (13 -152) | 21 (13 -148) | 0.06 |
Duration of medical treatment prior to URS (days) | 47.9 ± 9.4 | 50.8 ± 10.5 | 45.2 ± 7.5 | < 0.001 |
ECOG performance status n (%) | ||||
< 2 | 125 (81.2) | 57 (77) | 68 (85) | 0.1 |
≥ 2 | 29 (19.8) | 17 (23) | 12 (15) | |
Radiological findings | ||||
Hydronephrosis n (%) | 134 (87.0) | 69 (93.2) | 65 (81.3) | 0.05 |
Hydronephrosis grade n (%) | ||||
Mild | 108 (70.1) | 49 (66.2) | 59 (73.8) | 0.04 |
Moderate | 26 (16.9) | 20 (27) | 6 (7.5) | |
PAPD (mm) mean ± SD | 25.2 ± 7.5 | 27.2 ± 9.3 | 23.5 ± 6.9 | < 0.001 |
PUD (mm) mean ± SD | 11.3 ± 3.8 | 13.2 ± 3.7 | 10.1 ± 3.6 | < 0.001 |
UWT (mm) mean ± SD | 3.1 ± 1.7 | 3.91 ± 1.9 | 2.72 ± 1.68 | < 0.001 |
Stone characteristics | ||||
Size (mm) mean ± SD | 12.0 ± 3.4 | 14.2 ± 2.9 | 10.3 ± 3.4 | < 0.001 |
Side (right/left) n | 82/72 | 35/39 | 47/33 | 0.28 |
[Number (n) mean ± SD | 1.1 ± 0.4 | 1.24 ± 0.5 | 1.07 ± 0.3 | 0.03 |
Site n (%) | ||||
Upper | 58 (37.7) | 30 (40.5) | 28 (35) | 0.03 |
Middle | 24 (15.6) | 3 (4.1) | 21 (26.2) | |
Lower | 72 (46.7) | 41 (55.4) | 31 (38.8) | |
Density (HU) | 470.9 ± 163.6 | 468.1 ± 167.4 | 469.8 ± 162.9 | 0.82 |
Endoscopic findings n (%) | ||||
Ureteral edema | 114 (74.0) | 50 (67.6) | 64 (80) | 0.1 |
Ureteral polyp | 33 (21.4) | 23 (31.1) | 10 (12.5) | |
White patch | 7 (4.6) | 1 (1.3) | 6 (7.5) | |