Table 1. Demographic, clinical, and laboratorial parameters of stone formers (SF) and non-stone formers (non-SF).
| Non-SF n = 136 |
SF n = 222 |
p | |
|---|---|---|---|
| Male/Female [n (%)] | 43 (31.6)/93 (68.4) | 104 (46.8)/118 (53.2) | 0.004 |
| Age | 36.0 ± 12.5 | 41.7 ± 12.5 | < 0.001 |
| BMI (kg/m2) | 25.8 ± 4.9 | 28.3 ± 5.8 | < 0.001 |
| Eutrophic [n (%)] | 67 (49.3%) | 69 (31.1%) | 0.54 |
| Overweight [n (%)] | 42 (30.9%) | 80 (36.0%) | < 0.001 |
| Obese [n (%)] | 27 (19.9%) | 67 (30.2%) | 0.03 |
| WC (cm) | 89.7 ±14.0 | 96.5 ± 14.2 | 0.012 |
| Diabetes [n (%)] | 5 (3.7%) | 26 (11.7%) | 0.006 |
| Hypertension [n (%)] | 10 (7.4%) | 57 (25.7%) | < 0.001 |
| Serum | |||
| Fasting glucose (mg/dL) | 81.7 ± 9.9 | 96.6 ± 24.7 | < 0.001 |
| Urea (mg/dL) | 28.4 (23.0 - 34.5) | 29.9 (24.0 - 34.7) | 0.22 |
| Creatinine (mg/dL) | 0.8 (0.6 - 0.9) | 0.9 (0.7 - 1.0) | 0.07 |
| Uric acid (mg/dL) | 4.9 (4.0 - 5.8) | 5.2 (4.0 - 6.3) | 0.38 |
| Potassium (mg/dL) | 4.5 (4.2 - 4.7) | 4.3 (4.1 - 4.5) | 0.02 |
| Phosphorus (mg/dL) | 3.4 (2.9 - 3.7) | 3.3 (2.9 - 3.7) | 0.50 |
| Total cholesterol (mg/dL) | 183 (156 - 209) | 198 (166 - 224) | 0.16 |
| LDL cholesterol (mg/dL) | 105 (80 - 126) | 114 (91 - 138) | 0.07 |
| HDL cholesterol (mg/dL) | 53.2 ± 12.8 | 52.2 ± 23.0 | 0.69 |
| Triglycerides (mg/dL) | 116 ± 88.0 | 159 ± 93.1 | 0.01 |
| Urine | |||
| Volume (mL) | 1478 ± 691 | 1937 ± 763 | < 0.001 |
| Calcium (mg/24h) | 158 ± 88 | 216 ± 118 | 0.01 |
| Sodium (mEq/24h) | 172 ± 62 | 206 ± 89 | 0.04 |
| Potassium (mEq/24h) | 49.0 (33.7 - 60.7) | 50.0 (39.5 - 63.5) | 0.57 |
| Magnesium (mg/24h) | 98.2 ± 78.7 | 87.5 ± 38.0 | 0.23 |
| Citrate (mg/24h) | 765 ± 578 | 449 ± 254 | < 0.001 |
| Oxalate (mg/24h) | 20.2 ± 7.4 | 23.9 ± 10.4 | 0.02 |
| Uric acid (mg/24h) | 551 (430 - 665) | 585 (438 - 726) | 0.31 |
| Phosphorus (mg/24h) | 741 (498 - 923) | 821 (598 - 1052) | 0.58 |
| Urea (g/24h) | 18.4 (14.4 - 24.2) | 20.7 (16.1 - 24.8) | 0.15 |
| Creatinine (mg/24h) | 1379 (1108 - 1801) | 1478 (1174 - 1892) | 0.36 |
| pH | 6.2 (5.6 - 6.6) | 6.1 (5.7 - 6.5) | 0.15 |
BMI: body mass index; WC: waist circumference; Mean ± SD ; Median (IQR).