title: Habitual dietary phosphorus intake and urinary excretion in chronic kidney disease patients: a 3-day observational study.
abstract: Hyperphosphatemia in chronic kidney disease (CKD) is associated with vascular calcification, cardiovascular morbidity and mortality. The aim of this study was to estimate the daily dietary phosphorus intake compared with recommendations in CKD patients and to evaluate the reproducibility of the 24-h urinary phosphorus excretion. Twenty CKD patients stage 3-4 from the outpatient clinic, collected 24-h urine and kept dietary records for 3 consecutive days. The mean daily phosphorus intake was 1367±499, 1642±815 and 1426±706 mg/day, respectively (P=0.57). The mean urinary phosphorus excretion was 914±465, 954±414 and 994±479 mg/day, respectively (P=0.21). In this population of CKD patients stage 3-4 the daily phosphorus intake was above the recommended. Twenty-four-hour urinary phosphorus excretion was reproducible and the data indicate that a single 24-h urine collection is sufficient to estimate the individual phosphorus excretion.
authors.affiliation: Department of Nephrology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.|Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark.
authors.forename: L
authors.initials: L
authors.lastname: Salomo
authors.affiliation: Department of Nephrology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
authors.forename: A-L
authors.initials: AL
authors.lastname: Kamper
authors.affiliation: Department of Nephrology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
authors.forename: G M
authors.initials: GM
authors.lastname: Poulsen
authors.affiliation: Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark.
authors.forename: S K
authors.initials: SK
authors.lastname: Poulsen
authors.affiliation: Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark.
authors.forename: A
authors.initials: A
authors.lastname: Astrup
authors.affiliation: Department of Nephrology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
authors.forename: M
authors.initials: M
authors.lastname: Rix
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D054559:Hyperphosphatemia / Q000150:complications / Q000188:drug therapy / Q000652:urine; D008297:Male; D008875:Middle Aged; D009752:Nutritional Status; D016226:Phosphorus, Dietary / Q000008:administration & dosage* / Q000652:urine*; D051436:Renal Insufficiency, Chronic / Q000150:complications / Q000188:drug therapy* / Q000652:urine*; D015203:Reproducibility of Results; D055815:Young Adult
chemical_list: D016226:Phosphorus, Dietary