Table 2.
Predictors for treatment success for MET alone in SS post-SWL
| Variable | Treatment success N = 40 | Treatment failure N = 105 | P value | Multivariate analysis OR (95%CI) P value |
|---|---|---|---|---|
| Age in years (mean ± SD)a | 44.1 ± 11.2 | 46.6 ± 12.8 | 0.1 | |
| Gender (no. of pts)b | ||||
| Male | 30(75) | 79 (75.2) | 0.9 | |
| Female | 10(25) | 26 (24.8) | ||
| Obesity (no. of pts)b | ||||
| Non-obese | 22 (55) | 50 (47.6) | 0.4 | |
| Obese | 18 (45) | 55 (52.4) | ||
| Presence of ureteral stent (no. of pts)b | ||||
| No | 39 (97.5) | 94 (89.5) | 0.2 | |
| Yes | 1 (2.5) | 11 (10.5) | ||
| Time to clearance in weeks (mean ± SD)a | 2.5 ± 1.2 | 3.9 ± 1.1 | 0.1 | |
| Site of stones (no. of pts)b | ||||
| Pelvic | 19 (47.5) | 56 (53.3) | 0.7 | |
| Iliac | 5 (12.5) | 14 (13.3) | ||
| Lumbar | 16 (40) | 35 (33.3) | ||
| Type of steinstrasse (no. of pts)b | ||||
| Type I | 31 (77.5) | 73 (69.5) | 0.6 | |
| Type II | 7 (17.5) | 24 (22.9) | ||
| Type III | 2(5) | 8 (7.6) | ||
| Stone size (no. of pts)b | ||||
| ≤ 10 mm | 38 (95) | 76 (72.4) | 0.003 | 7.85 (1.3–14.5) 0.02 |
| > 10 mm | 2 (5) | 29 (27.6) | ||
| Ureteral wall thickness (median & range)c | 2 (1–3) | 3 (1–7) | 0.001 | 3.95 (1.6–11.92) 0.01 |
| Hounsfield unit of the stones (mean ± SD)a | 745 ± 284.6 | 853 ± 290 | 0.9 | |
Bold values mean statistically significance
No. of pts number of patients
aIndependent sampled t test
bChi-square test
cMann–Whitney test