Table 3. Univariate and multivariate analyses of associations between various parameters and stone-free.
| Group | Stone-free (n=116) | Residual stone (n=20) | Univariate analysis | Multivariate analysis | |||||
|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | P value | OR | 95% CI | P value | ||||
| Age (years) | 62 [34–88] | 64 [42–85] | 0.97 | 0.93–1.01 | 0.16 | ||||
| Sex (male) | 86 [74] | 13 [65] | 1.54 | 0.54–4.15 | 0.40 | ||||
| Body mass index (kg/m2) | 24 [16–33] | 23 [15–35] | 1.11 | 0.98–1.27 | 0.12 | ||||
| Stone size (mm) | 12 [6–19] | 13 [8–19] | 0.91 | 0.80–1.04 | 0.17 | ||||
| Stone laterality (right) | 66 [57] | 11 [55] | 1.08 | 0.41–2.81 | 0.87 | ||||
| CT value (HU) | 1,270 [350–1,850] | 1,500 [520–1,960] | 1.00 | 1.00–1.00 | 0.04 | 1.00 | 1.00–1.00 | 0.02 | |
| Hydronephrosis | |||||||||
| Grade 1 | 21 [18] | 5 [25] | Reference | ||||||
| Grade 2 | 74 [64] | 9 [45] | 1.96 | 0.55–6.33 | 0.28 | ||||
| Grade 3 | 21 [18] | 6 [30] | 0.83 | 0.21–3.18 | 0.79 | ||||
| URS with PNS | 58 [50] | 3 [15] | 5.67 | 1.78–25.20 | 0.01 | 7.06 | 2.10–32.83 | 0.01 | |
Date are presented as median [range] or n [%]. CT, computed tomography; URS, ureteroscopy; PNS, percutaneous nephrostomy; OR, odds ratio; CI, confidence interval.