Table 2. Demographic data and success rate comparisons between stenting and stentless groups for the propensity-matched cohort.
| Variable | Total matched cohort (n=399) | Stenting group (n=57) | Stentless group (n=342) | p-value |
|---|---|---|---|---|
| Age (y) | 56.22±13.86 | 56.86±14.10 | 56.11±13.84 | 0.708a |
| Sex | 0.681b | |||
| Male | 265 (66.4) | 36 (63.2) | 229 (67.0) | |
| Female | 134 (33.6) | 21 (36.8) | 113 (33.0) | |
| MSL (mm) | 10.75±4.27 | 12.03±6.02 | 10.53±3.88 | 0.075a |
| SSD (cm) | 110.30±20.25 | 105.90±24.84 | 111.50±19.46 | 0.140a |
| MSD (HU) | 758.14±285.11 | 717.86±285.06 | 764.94±284.92 | 0.250a |
| SHI (HU) | 250.43±116.45 | 237.89±121.75 | 250.99±117.80 | 0.381a |
| Prior stone episodes | 0.763b | |||
| FSF | 280 (70.2) | 39 (68.4) | 241 (70.5) | |
| RSF | 119 (29.8) | 18 (31.6) | 101 (29.5) | |
| Stone location | 0.617b | |||
| Upper | 328 (82.2) | 46 (80.7) | 282 (82.5) | |
| Middle | 30 (7.5) | 6 (10.5) | 24 (7.0) | |
| Lower | 41 (10.3) | 5 (8.8) | 36 (10.5) | |
| Stone laterality | 0.775b | |||
| Right | 196 (49.1) | 29 (50.9) | 167 (48.8) | |
| Left | 203 (50.8) | 28 (49.1) | 175 (51.2) | |
| One-session success | 252 (63.1) | 28 (49.1) | 224 (78.6) | 0.026b |
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.