Table 1 Baseline characteristics of patients before and after propensity score-matching
Before propensity score-matching | After propensity score-matching | |||||
|---|---|---|---|---|---|---|
Variables | Non-stented group (n = 614) | Preoperatively stented group (n = 113) | p-value | Non-stented group (n = 339) | Preoperatively stented group (n = 113) | p-value |
Mean age (year) | 55.4 ± 14.2 | 57.5 ± 14.1 | 0.151 | 57.6 ± 13.0 | 57.5 ± 14.1 | 0.949 |
Mean BMI (Kg/m2) | 24.8 ± 4.4 | 24.6 ± 2.9 | 0.668 | 24.7 ± 3.3 | 24.6 ± 2.9 | 0.842 |
Gender | 0.011 | 0.594 | ||||
Male | 386 (62.9%) | 56 (49.6%) | 183 (54.0%) | 56 (49.6%) | ||
Female | 228 (37.1%) | 57 (50.4%) | 156 (46.0%) | 57 (50.4%) | ||
Preoperative Hb | 13.5 ± 1.8 | 13.4 ± 2.0 | 0.767 | 13.1 ± 1.8 | 13.4 ± 2.0 | 0.208 |
Preoperative Cr | 1.0 ± 0.6 | 1.1 ± 0.5 | 0.179 | 1.1 ± 0.8 | 1.1 ± 0.5 | 0.869 |
Preoperative GFR | 79.9 ± 28.0 | 72.0 ± 24.0 | 0.002 | 73.1 ± 22.6 | 72.0 ± 24.0 | 0.724 |
Modified S-ReSC score group | < 0.001 | 0.464 | ||||
Low | 507(82.6%) | 28(24.8%) | 117 (34.5%) | 28(24.8%) | ||
Medium | 44(7.2%) | 13(11.5%) | 33 (9.7%) | 13(11.5%) | ||
High | 63(10.2%) | 72(63.7%) | 189 (55.8%) | 72(63.7%) | ||
Laterality | < 0.001 | 0.088 | ||||
Right | 338 (55.0%) | 51 (45.1%) | 126 (37.2%) | 51 (45.1%) | ||
Left | 276 (45.0%) | 62 (54.8%) | 213 (62.8%) | 62 (54.8%) | ||
Density of stones (HU) | 823.7 ± 352.6 | 889.3 ± 370.1 | 0.072 | 908.3 ± 336.7 | 889.3 ± 370.1 | 0.687 |
Stone max diameter (mm) | 12.0 ± 8.5 | 13.8 ± 9.7 | 0.058 | 14.3 ± 9.9 | 13.8 ± 9.7 | 0.715 |
Number of stone | 0.232 | 0.194 | ||||
1 | 310 (50.5%) | 49 (43.4%) | 174 (51.3%) | 49 (43.4%) | ||
2 | 123 (20.0%) | 30 (26.5%) | 57 (16.8%) | 30 (26.5%) | ||
≥ 3 | 181 (29.5%) | 34 (30.1%) | 108 (31.9%) | 34 (30.1%) | ||
Hydronephrosis | 169 (27.5%) | 59 (52.2%) | < 0.001 | 162 (47.8%) | 59 (52.2%) | 0.425 |