title: Different estimates of the risk of calcium oxalate crystallization in urine.
abstract: Different mathematical expressions of urinary calcium, oxalate, magnesium, citrate and urine volume (V), formulated in order to reflect supersaturation with respect to calcium oxalate, were compared with the computer-calculated ion-activity product of calcium oxalate (APCaOx). A good correlation (r = 0.99) was demonstrated for the following two simplified relationships and APCaOx:Ca0.71 X Ox and (Ca0.71 X Ox)/V1.2. The correspondence between Ca/Mg quotients and APCaOx was generally less satisfactory.
mesh_terms: D002129:Calcium Oxalate / Q000652:urine*; D002951:Citrates / Q000652:urine; D003201:Computers; D003460:Crystallization; D006801:Humans; D008274:Magnesium / Q000652:urine; D008433:Mathematics; D012306:Risk; D014545:Urinary Calculi / Q000652:urine
chemical_list: D002951:Citrates; D002129:Calcium Oxalate; D008274:Magnesium