Table 3.
Plasma and urine chemistry in patients with calcium oxalate containing kidney stones at baseline and after seven days on low-calcium low-sodium diet
| Blood parameters | Baseline (SD) | Diet (SD) |
|---|---|---|
| Creatinine in umol/l | 86.3 (22.0) | 88.3 (21.8)* |
| Sodium in mmol/l | 141.4 (2.3) | 141.6 (1.9)ns |
| Potassium in mmol/l | 3.9 (0.3) | 4.0 (0.4)*** |
| Magnesium in mmol/l | 0.82 (0.07) | 0.84 (0.08)*** |
| Bicarbonate in mmol/l | 26.4 (2.5) | 26.8 (2.7)* |
| Uric acid in mmol/l | 331.4 (82.2) | 351.1 (93.0)*** |
| Urea in mmol/l | 5.6 (1.9) | 5.3 (2.0)** |
| Chloride in mmol/l | 104.9 (2.7) | 104.6 (2.8)ns |
| Calcium in mmol/l | 2.3 (0.1) | 2.3 (0.1)ns |
| Phosphate in mmol/l | 1.0 (0.2) | 0.9 (0.2)ns |
| iPTH in pg/l | 47.4 (20.0) | 49.2 (18.8)* |
| 1,25-(OH)2−Vitamin D3 in ng/ml | 52.0 (16.1) | nd |
| Urine parameters SD | ||
| Volume in ml | 2170 (904) | 2145 (724)ns |
| Urinary pH | 6.3 (0.6) | 6.4 (0.6)ns |
| Sodium in mmol/d | 200.7 (89.0) | 128.3 (87.6)*** |
| Potassium in mmol/d | 65.8 (31.9) | 60.7 (28.7)* |
| Chloride in mmol/d | 195.0 (81.4) | 128.0 (78.6)*** |
| Calcium in mmol/d | 5.7 (3.0) | 4.1 (2.5)*** |
| Magnesium in mmol/d | 4.1 (1.7) | 4.0 (1.8)ns |
| Phosphate in mmol/d | 28.5 (10.5) | 24.0 (9.7)*** |
| Urea in mmol/d | 416.3 (151.3) | 366.7 (139.8)*** |
| Creatinine in mmol/d | 14.0 (4.4) | 13.8 (4.7)ns |
| Uric acid in mmol/d | 3.5 (1.3) | 3.3 (1.2)ns |
| Glucose in mmol/d | 4.0 (26.5) | 2.3 (8.9)ns |
| Citrate in mmol/d | 2.4 (1.6) | 2.5 (1.5)ns |
| Oxalate in mmol/d | 0.39 (0.26) | 0.39 (0.19)ns |
| Ammonium in mmol/d | nd | 42.2 (77.7) |
nd not determined, ns non significant = p > 0.05, *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001; SD standard deviation