Table 1.
predictors for non-invasive treatment (MET ± SWL) success in SS post-SWL
| Variable | Total patients N = 145 | Treatment success N = 78 | Treatment failure N = 67 | P value | Multivariate analysis OR (95%CI) P value |
|---|---|---|---|---|---|
| Age in years (mean ± SD)a | 45.9 ± 12.4 | 43.97 ± 12.87 | 48.2 ± 11.6 | 0.3 | |
| Gender (no. of pts)b | |||||
| Male | 109 (75.2) | 57 (73.1) | 52(77.6) | 0.5 | |
| Female | 36 (24.8) | 21 (26.9) | 15(22.4) | ||
| Obesity (no. of pts)b | |||||
| Non-obese | 72 (49.7) | 44 (56.4) | 28 (41.8) | 0.07 | |
| Obese | 73 (50.3) | 34 (43.6) | 39 (58.2) | ||
| Presence of ureteral stent (no. of pts)b | |||||
| No | 133 (91.7) | 74 (94.9) | 59 (88.1) | 0.1 | |
| Yes | 12 (8.3) | 4 (5.1) | 8 (11.9) | ||
| Mode of treatment (no. of pts)b | |||||
| MET only | 66 (45.5) | 40 (51.3) | 26 (38.8) | 0.1 | |
| MET + SWL | 79 (55.5) | 38 (48.7) | 41 (61.2) | ||
| Site of stones (no. of pts)b | |||||
| Pelvic | 75 (51.7) | 40 (51.3) | 35 (52.3) | 0.7 | |
| Iliac | 19 (13.1) | 9 (11.5) | 10 (14.9) | ||
| Lumbar | 51 (35.2) | 29 (37.2) | 22 (32.8) | ||
| Type of steinstrasse (No. of pts)b | |||||
| Type I | 104 (71.7) | 65 (83.3) | 39 (58.2) | 0.002 | 2.7 (1.05–7.52) 0.04 |
| Type II | 31 (21.4) | 11(14.1) | 20 (29.9) | ||
| Type III | 10 (6.9) | 2 (2.6) | 8 (11.9) | ||
| Stone size (no. of pts)b | |||||
| < 10 mm | 114 (78.6) | 68 (87.2) | 46 (68.7) | 0.007 | 10.4 (3.02–18.1) < 0.0001 |
| ≥ 10 mm | 31 (21.4) | 10(12.8) | 21 (31.3) | ||
| Ureteral wall thickness (median & range)c | 2 (1–11) | 2 (1–6) | 4 (1–11) | < 0.0001 | 1.5 (1.3–2.89) < 0.0001 |
| Hounsfield unit of the stones (Mean ± SD)a | 830 ± 291 | 825 ± 294 | 835 ± 290 | 0.8 | |
Bold values mean statistically significance
No. of pts number of patients
aindependent sampled t test
bChi-square test &
cMann–Whitney test