title: Relation between hypercalciuria and vitamin D3-status in patients with urolithiasis.
abstract: Patients with urolithiasis were divided into two groups, one (n = 38) with a urinary excretion of calcium exceeding 6.0 mmol/24 h and one (n = 32) with a calcium excretion lower than 6.1 mmol/24 h. The group of patients with a high urinary excretion of calcium had a significantly higher level of 25-hydroxy vitamin D3 (26.2 +/- 1.6 ng/ml) than had the group of patients with a normal urinary excretion of calcium (17.6 +/- 0.9 ng/ml) (p less than 0.001). A highly specific and accurate method, based on isotope dilution--mass spectrometry was used in the assay of 25-hydroxy vitamin D3. There was no over-all correlation between level of 25-hydroxy vitamin D3 and serum level of calcium (r = 0.1). The results are in accordance with the contention that the vitamin D3-status might be of some importance for the development of hypercalciuria in these patients.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002112:Calcifediol / Q000097:blood*; D002118:Calcium / Q000097:blood / Q000652:urine*; D002762:Cholecalciferol / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D013058:Mass Spectrometry; D008875:Middle Aged; D010710:Phosphates / Q000097:blood; D012621:Seasons; D014545:Urinary Calculi / Q000097:blood / Q000652:urine*
chemical_list: D010710:Phosphates; D002762:Cholecalciferol; D002112:Calcifediol; D002118:Calcium