Table 1. Patient and stone data for the total cohort and three groups including calcium oxalate, infection, and uric acid stones.
| Total cohort | CaOx compound | Infection | Uric acid | P-value | |
|---|---|---|---|---|---|
| No. of patients | 214 | 140 | 33 | 41 | |
| Age | 54.86±15.59 | 52.56±16.19 | 55.67±13.81 | 62.05±12.61 | 0.002a |
| Sex | 0.374b | ||||
| Male | 85 | 20 | 30 | ||
| Female | 55 | 13 | 11 | ||
| Procedures | |||||
| ESWL | 9 | 7 | 1 | 1 | |
| LAPP | 2 | 1 | 0 | 1 | |
| LAPU | 14 | 10 | 3 | 1 | |
| PCNL | 36 | 11 | 11 | 14 | |
| RIRS | 19 | 14 | 3 | 2 | |
| URSL | 114 | 90 | 10 | 14 | |
| VESL | 12 | 1 | 5 | 6 | |
| Spontaneous passage | 8 | 6 | 0 | 2 | |
| Location | |||||
| Kidney | 60 | 27 | 17 | 16 | |
| Upper ureter | 69 | 51 | 8 | 10 | |
| Midureter | 12 | 11 | 0 | 1 | |
| Lower ureter | 62 | 50 | 4 | 8 | |
| Bladder | 11 | 1 | 4 | 6 | |
| MSL | 12.77±9.07 | 9.61±5.05 | 19.61±12.49 | 18.05±11.08 | <0.001a |
| MSD | 670.06±304.00 | 701.09±297.37 | 806.01±329.87 | 454.68±177.80 | <0.001a |
| SHI | 241.61±126.61 | 278.73±112.10 | 240.43±119.28 | 115.82±96.31 | <0.001a |
Data are mean±standard deviation or number.
CaOx: calcium oxalate; ESWL: extracorporeal shock wave lithotripsy; LAPP: laparoscopic pyelolithotomy; LAPU: laparoscopic ureterolithotomy; PCNL: percutaneous nephrolithotripsy; RIRS: retrograde intra-renal surgery; URSL: ureteroscopic lithotripsy; VESL: vesicolitholapaxy; MSL: maximal stone length; MSD: mean stone density; SHI: stone heterogeneity index
a. Based on one-way ANOVA
b. Based on Pearson's chi-squared tests with Yates' continuity correction