Table 1.

The characteristics and other variables in the 100 patients.

Variable	Mean (SD, range) or n
Age (years)	34.4 (15.1, 14–76)
Side involved (right/left)	33/67
Stone length (mm)	9.24 (2.40, 4–15)
Stone width (mm)	5.51 (1.85, 3–12)
Symptom duration (days)	18 (4, 3–54)
BMI (kg/m2)	24.8 (3.8, 20–36)
Stone attenuation value (HU)	592 (202, 280–1052)
Treatment time (min)	46 (18, 33–82)
Fluoroscopic time (min)	2.6 (2, 1.4–6.0)
No. of SWs delivered/session	3200 (1750, 2400–4000)
Voltage (kV)	17.6 (1.1, 15–19)
No. of shocks delivered/stone	5060 (2046, 2400–11,000)
No. of sessions/stone	1.4 (1–3)
Time to stone-free status (days)	13.7 (8.2, 2–40)