Table 1.

Subject Demographics

	Mean ± SD (n = 32)
Age	52 ± 17 years
Sex, n (%)
Male	24 (75)
Female	8 (25)
BMI	28.8 ± 6.1 kg/m2
Days between CT-US	37.6 ± 32.1
Stone size	6.3 ± 3.5 mm (range 2–19 mm)

BMI = body mass index; SD = standard deviation; US = ultrasound.