Table 1 Descriptive statistics for study variables
Stone Free (419) | Stone Residue (103) | t/χ2 | P | |
|---|---|---|---|---|
Age | 45.02 ± 18.05 | 47.04 ± 19.49 | 1.023 | 0.307 |
Gender | ||||
Male | 221(52.7%) | 46(44.7%) | 2.163 | 0.141 |
Female | 198(47.3%) | 57(55.3%) | ||
BMI | 28.00 ± 6.57 | 28.62 ± 6.19 | 0.875 | 0.382 |
History of surgery | ||||
absent | 302(72.1%) | 78(75.7%) | 0.557 | 0.456 |
present | 117(27.9%) | 25(24.3%) | ||
Stone Side | ||||
Left | 176(42.0%) | 59(57.3%) | 9.795 | 0.005 |
Right | 243(58.0%) | 44(42.7%) | ||
Hydronephrosis | ||||
None or Light | 106(25.3%) | 44(42.7%) | 12.296 | 0.002 |
Moderate | 202(48.2%) | 39(37.9%) | ||
Severe | 111(26.5%) | 20(19.4%) | ||
IPA | ||||
< 45° | 199(47.5%) | 39(37.9%) | 3.091 | 0.079 |
≥ 45° | 220(52.5%) | 64(62.1%) | ||
Average Hounsfield unit | ||||
≤ 950 | 215(51.3%) | 44(42.7%) | 2.443 | 0.118 |
> 950 | 204(48.7%) | 59(57.3%) | ||
RIL | ||||
< 30mm | 268(64.0%) | 45(43.7%) | 14.153 | 0.000 |
≥ 30mm | 151(36.0%) | 58(56.3%) | ||
RIW | ||||
< 5mm | 155(37.0%) | 50(48.5%) | 4.625 | 0.032 |
≥ 5mm | 264(63.0%) | 53(51.5%) | ||
Hospitalization | 7.10 ± 1.38 | 7.20 ± 1.45 | 6.709 | 0.152 |
Stone Burden | 504.69 ± 108.32 | 605.83 ± 137.63 | 8.021 | 0.000 |
Skin to stone distance | 9.88 ± 2.93 | 9.77 ± 2.71 | 0.351 | 0.726 |
Operative time | 121.92 ± 31.29 | 118.23 ± 30.73 | 0.783 | 0.434 |
Number of calyces involved | ||||
1, 2 | 232(55.4%) | 14(13.6%) | 75.069 | 0.000 |
3 | 135(32.2%) | 45(43.7%) | ||
≥ 4 | 52(12.4%) | 44(42.7%) | ||