Table 1.
Preoperative characteristics of the study groups
| Characteristic |
EL Group (N = 72) |
EM Group (N = 107) |
P |
|---|---|---|---|
| N (%): | |||
| Gender Male Female |
49 (68) 23 (32) |
88 (82.2) 19 (17.8) |
0.028* |
| Stone history First time Recurrent |
62 (86) 10 (14) |
94 (88) 13 (12) |
0.733* |
| Hydronephrosis No or mild Moderate |
65 (90.3) 7 (9.7) |
76 (71) 31 (29) |
0.002* |
| Stone side Right Left |
45 (62.5) 27 (37.5) |
55 (51.4) 52 (48.6) |
0.143* |
| Stone level Proximal ureter Distal ureter |
26 (36) 46 (64) |
25 (23.4) 82 (76.6) |
0.064* |
| Mean (SD): | |||
| Age, years | 40.8 (11.7) | 43.1 (12.8) | 0.226& |
| Creatinine level µmol/L mg/dL |
79.9 (20.6) 0.91 (0.23) |
133.1 (57.4) 1.5 (0.65) |
<0.001& |
| Stone length,mm | 9.1 (3.7) | 7.1 (2.9) | <0.001& |
*Chi-square test; &Independent-samples t-test