Table 1.

Characteristics of United States veterans with incident urinary stone disease from 2007 to 2013

CharacteristicsWithout 24-h Urine Testing (N=113,186; 87%)With 24-h Urine Testing (N=17,303; 13%)
Age (mean±SD, yr)61±1458±12
Sex (N, %)
 Male107,383 (95%)16,042 (93%)
 Female5803 (5%)1261 (7%)
Race (N, %)
 White87,541 (77%)13,803 (80%)
 Black12,540 (11%)1521 (9%)
 Other or unknown13,105 (12%)1979 (11%)
Laboratory data
 BMI (mean±SD, kg/m2)29.9±6.230.7±6.3
 eGFR (mean±SD, ml/min per 1.73m2)73±2577±23
 Creatinine (mean±SD, mg/dl)1.3±2.71.7±1.4
 Potassium (mean±SD, mEq/L)4.2±0.54.2±1.1
 Sodium (mean±SD, mEq/L)139±4139±6
 Bicarbonate (mean±SD, mEq/L)27±427±3
 Calcium (mean±SD, mg/dl)9.3±1.410.2±1.6
 Albumin (mean±SD, g/dl)4.1±15.14.1±1.2
Comorbidities (N, %)
 Hypertension76,811 (68%)10,944 (63%)
 Gout6467 (6%)1005 (6%)
 Osteoporosis2530 (2%)484 (3%)
 Osteopenia2259 (2%)441 (3%)
 Diabetes mellitus42,214 (37%)6690 (39%)
 CKD3769 (3%)430 (2%)
 Cardiovascular disease9608 (8%)947 (5%)
Baseline medications (N, %)
 Thiazide or thiazide-like diuretics19,188 (17%)2815 (16%)
 Alkali therapy1000 (1%)192 (1%)
 Allopurinol5861 (5%)890 (5%)
Geographic region (N, %)
 Midwest27,962 (25%)4795 (28%)
 Northeast18,737 (17%)2244 (13%)
 Southeast43,521 (38%)5314 (31%)
 West22,966 (20%)4950 (28%)
  • BMI, body mass index.