Table 1 Demographic, clinical characteristics and perioperative variables of patients who underwent RIRS for lower pole kidney stones
From: External validation of the T.O.HO. score as predictor of success after retrograde intrarenal surgery
Total (n = 611) | Successful (n = 443, 72.5%) | Unsuccessful (n = 168, 27.5%) | p | |
|---|---|---|---|---|
Age (years) | 46.1 ± 14.2 | 45.7 ± 14.3 | 47.1 ± 13.8 | 0.209 m |
Sex | 0.671 c | |||
Male, n (%) | 385 (63) | 277 (62.5) | 108 (64.4) | |
Female, n (%) | 226 (37) | 166 (37.5) | 60 (35.6) | |
Stone length (mm) (mean ± SD) | 16.3 ± 8.4 | 14 ± 5.5 | 22.5 ± 11.2 | < 0.001 m |
Stone location | < 0.001 c | |||
Ureter and renal pelvis, n (%) | 251 (41.1) | 201 (45.4) | 50 (30) | |
Middle and upper pole, n (%) | 91 (15) | 78 (17.6) | 14 (8.1) | |
Lower pole, n (%) | 269 (43.9) | 162 (37) | 104 (61.9) | |
Stone density (HU) (mean ± SD) | 962.1 ± 327.2 | 914.5 ± 321 | 1087.3 ± 310.6 | < 0.001 m |
Stone number | 0.097 c | |||
Single, n (%) | 395 (64.7) | 295 (66.7) | 100 (59.4) | |
Multiple, n (%) | 216 (35.3) | 148 (33.3) | 68 (40.6) | |
Lateralization | 0.999 c | |||
Right, n (%) | 290 (47.5) | 210 (47.5) | 80 (47.5) | |
Left, n (%) | 321 (52.5) | 233 (52.5) | 88 (52.5) | |
Precence of preoperative stent | 0.218 c | |||
Yes, n (%) | 99 (16.2) | 77 (17.3) | 22 (13.1) | |
No, n (%) | 512 (83.8) | 366 (82.7) | 146 (86.9) | |
Precence of hydronephrosis | 0.062 c | |||
Yes, n (%) | 358 (58.7) | 270 (61) | 88 (52.5) | |
No, n (%) | 253 (41.3) | 173 (39) | 80 (47.5) | |
Surgical duration (min) (mean ± SD) | 54.3 ± 18.3 | 50.6 ± 16.6 | 64 ± 19.1 | < 0.001 m |
Hospitalization (day) (median) (min–max) | 1(1–15) | 1(1–10) | 1(1–15) | 0.296 m |
T.O.HO. score (mean ± SD) | 6.6 ± 1.9 | 6 ± 1.7 | 8.1 ± 1.5 | < 0.001 m |