Table 1. Demographic data and success rate comparisons between stenting and stentless groups for the total cohort.
| Variable | Total cohort (n=680) | Stenting group (n=57) | Stentless group (n=623) | p-value |
|---|---|---|---|---|
| Age (y) | 52.18±14.33 | 56.86±14.10 | 51.75±14.29 | 0.010a |
| Sex | 0.873b | |||
| Male | 442 (65.0) | 36 (63.2) | 406 (65.2) | |
| Female | 238 (35.0) | 21 (36.8) | 217 (34.8) | |
| MSL (mm) | 9.22±3.92 | 12.03±6.02 | 8.96±3.57 | <0.001a |
| SSD (cm) | 110.50±19.22 | 105.90±24.84 | 110.00±18.58 | 0.135a |
| MSD (HU) | 708.04±272.19 | 717.86±285.06 | 707.14±271.20 | 0.776a |
| SHI (HU) | 242.22±108.47 | 237.89±121.75 | 242.62±107.27 | 0.753a |
| Prior stone episodes | 0.763b | |||
| FSF | 483 (71.0) | 39 (68.4) | 444 (71.3) | |
| RSF | 197 (29.0) | 18 (31.6) | 179 (28.7) | |
| Stone location | 0.482b | |||
| Upper | 554 (81.5) | 46 (80.7) | 508 (81.5) | |
| Middle | 48 (7.0) | 6 (10.5) | 42 (6.7) | |
| Lower | 78 (11.5) | 5 (8.8) | 73 (11.7) | |
| Stone laterality | 0.610b | |||
| Right | 324 (47.6) | 29 (50.9) | 295 (47.4) | |
| Left | 356 (52.4) | 28 (49.1) | 328 (52.6) | |
| Complication rate | 25 (3.7) | 23 (3.7) | 2 (3.5) | 1.000 |
| Pyelonephritis | 1 (0.1) | 1 (0.2) | 0 (0.0) | |
| Hematuria | 2 (0.3) | 2 (0.3) | 0 (0.0) | |
| Colic pain | 21 (3.1) | 19 (3.0) | 2 (3.5) | |
| GI symptoms | 1 (0.1) | 1 (0.2) | 0 (0.0) | |
| One-session success | 476 (70.0) | 28 (49.1) | 448 (71.9) | <0.001b |
Values are presented as mean±standard deviation or number (%).
MSL, maximal stone length; SSD, skin-to-stone distance; MSD, mean stone density; SHI, stone heterogeneity index; FSF, first-time stone formers; RSF, recurrent stone formers; HU, Hounsfield units.
a:Based on Student or Welch's two-sample t-tests. b:Based on Pearson chi-square tests with Yates' continuity correction.