Table 1.

Patient Characteristics

Patient characteristics	Obtained 24-hour urine (n=317)	Did not obtain 24-hour urine (n=306)
Median age in years (IQR)	14.4 (11.0, 16.3)	14.4 (10.5, 16.3)
BMI (SD)	22.1 (6.7)	20.9 (4.9)
Sex
Female	161 (50.8%)	157 (51.3%)
Male	156 (49.2%)	149 (48.7%)
Insurance
Medicaid/Medicare	46 (14.5%)	76 (24.8%)
Private	240 (75.7%)	165 (53.9%)
Self-pay/Unknown	31 (9.8%)	65 (21.2%)
Race
African-American	19 (6.0%)	47 (15.4%)
Caucasian	245 (77.3%)	190 (62.1%)
Other	30 (9.5%)	34 (11.1%)
Unknown	33 (10.4%)	35 (11.4%)
Family history of stones
Yes	171 (53.9%)	103 (33.7%)
No	132 (41.6%)	178 (58.2%)
Unknown	14 (4.4%)	25 (8.2%)
Stone history
Recurrent stone former	104 (32.8%)	33 (10.8%)
Medical Comorbidities
Yes	115 (36.3%)	157 (51.3%)