Table 2. Patient Baseline Characteristics
Characteristic LSE Group Control Group p value
Number 24 24
Age (year, mean) 45.0±15.6 42.5±18.7 0.71
(median, range) 45 (2-72) 44 (5-66)
Gender
Male 10/24 (42%) 12/24 (50%) 0.77
Female 14/24 (58%) 12/24 (50%)
BMI (kg/m2) 27.2±3.2 27.0±5.1 0.57
Side
Right 13/24 (54%) 17/24 (71%) 0.37
Left 11/24 (46%) 7/24 (29%)
Stone Burden (mm) 11.9±3.1 11.1±4.2 0.21
Hounsfield Unit (mean) 1100±377 1076±358 0.72
Localisation
Lower Calyx 4/24 (17%) 4/24 (16%)
Other Calyces 5/24 (21%) 9/24 (38%) 0.29
Pelvis 14/24 (58%) 8/24 (33%)
Multiple Loc. 1/24 (4%) 3/24 (13%)
Previous history of failed SWL for same stone 12/24 (50%) 13/24 (58%) 0.77
Preoperative Double J Stent 9/24 (38%) 8/24 (33%) 0.76