Table I.
Study group characteristics.
| Control | Patients | |
|---|---|---|
| Gender (n, %) | ||
| Female | 30 (29%) | 23 (35%) |
| Male | 74 (71%) | 42 (65%) |
| Age (mean ± SD) | 40.8±9.9 | 42.9±10.2 |
| BMI (kg/m2) (mean) | 24.1 | 24.9 |
| Smoking (n, %) | 25 (24%) | 32 (49%) |
| Recurrence (n) | 0 | 44 |
| Familial history of urolithiasis (n) | 0 | 65 |
| Blood chemistry (mean) | ||
| Creatinine (mg/dl) | 0.38 | 1.05 |
| PTH (pg/dl) | 38.5 | 66.94 |
| Ca (mg/dl) | 9.2 | 9.42 |
| Mg (mg/dl) | 1.8 | 2.22 |
| P (mg/dl) | 3.4 | 3.09 |
| Urine chemistry (mean) | ||
| Uric acid (mg/l) | 5.8 | 72.81 |
| pH | 5.52 | 5.76 |
| Creatinine (mg/24 h) | 0.28 (male) 0.69 (female) |
114.46 |
| Oxalate (mg/day) | 38 | 42 |
| Citrate (mg/day) | 118 | 230 |