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

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

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)