Table 1 Comparison of patient characteristics according to postoperative stone-free status
Variables | stone-free group(n = 120) | stone- residual group(n = 30) | P value |
|---|---|---|---|
Age, years | 49.27 ± 11.99 | 51.00 ± 12.23 | 0.482† |
Gender, n (%) | |||
Male | 79(65.8%) | 23(76.7%) | 0.255* |
Female | 41(34.2%) | 7(23.3%) | |
BMI, kg/m2 | 24.29 ± 3.11 | 25.24 ± 3.37 | 0.143† |
Affected side(n, %) | |||
Left | 61(50.8%) | 19(63.3%) | 0.220* |
Right | 59(49.2%) | 11(36.7%) | |
Preoperative stent (n, %) | |||
Yes | 25(20.8%) | 3(10.0%) | 0.173* |
No | 95(79.2%) | 27(90.0%) | |
Prior treatment(n, %) | |||
Yes | 34(28.3%) | 10(66.7%) | 0.591* |
No | 86(71.7%) | 20(33.3%) | |
Stone surface area,mm3 [14] | 513.9 ± 406.1 | 1844.3 ± 1179.4 | <0.001 |
Renal pelvis volume,mm3 [14] | 2240.0 ± 2019.7 | 5472.2 ± 7092.6 | 0.019 |
Visible number of calyces | 1.96 ± 1.6 | 2.27 ± 2.5 | 0.553† |
Essence of stone,HU | 973.3 ± 360.4 | 1240.8 ± 411.4 | <0.001 |
Length of calyces funnel,mm | 20.9 ± 6.1 | 28.7 ± 6.1 | <0.001 |
Pelvic calyceal height,mm | 22.4 ± 7.7 | 26.0 ± 7.7 | 0.052† |
Obstruction by S.O.L.V.E.,mm | 16.5 ± 6.0 | 15.0 ± 5.0 | 0.216† |
Operation time, min | 29.3 ± 15.4 | 54.2 ± 30.83 | <0.001 |