Table 2. Distribution of the studied cases according to stone data.
SD: standard deviation, C2: Chi-square test, t: Student's t-test, U: Man-Whitney test, H/U: Hounsfield unit, P: p-value for comparing between the studied groups
| Variables | Group 1 (n = 35) | Group 2 (n = 35) | Test of Sig. | P-value | ||
| Laterality | No. | % | No. | % | ||
| Left | 15 | 42.9 | 17 | 48.6 | c2 = 0.230 | 0.631 |
| Right | 20 | 57.1 | 18 | 51.4 | ||
| Site | ||||||
| L2 | 7 | 20.0 | 4 | 11.4 | c2 = 2.329 | 0.312 |
| L3 | 12 | 34.3 | 18 | 51.4 | ||
| L4 | 16 | 45.7 | 13 | 37.1 | ||
| Ureteral stone diameter (millimeter) | ||||||
| Range (mm) | 10–20 | 10–20 | t = 1.473 | 0.145 | ||
| Mean ± SD | 13.48 ± 3.2 | 14.69 ± 3.64 | ||||
| Stone opacity | No. | % | No. | % | ||
| Faint radio-opaque | 3 | 8.6 | 2 | 5.7 | c2 = 0.718 | 0.699 |
| Radio-lucent | 3 | 8.6 | 5 | 14.3 | ||
| Radio-opaque | 29 | 82.9 | 28 | 80.0 | ||
| H/U | ||||||
| Range | 390–1830 | 466–1912 | U = 582.0 | 0.720 | ||
| Median (IQR) | 1130 (890–1525) | 1220 (965–1368.5) | ||||
| Degree of hydronephrosis | No. | % | No. | % | ||
| Minimal (Grade I) | 1 | 2.9 | 0 | 0.0 | c2 = 11.620 | 0.008 |
| Mild (Grade II) | 24 | 68.6 | 11 | 31.4 | ||
| Moderate (Grade III) | 7 | 20.0 | 16 | 45.7 | ||
| Marked (Grade IV) | 3 | 8.6 | 8 | 22.9 | ||