title: [Influence of nutrition, age and vitamin D status on fasting urinary excretion of calcium in postmenopausal women].
abstract: The purpose of the present study was to evaluate the influence of nutrition, age, and Vitamin D status on fasting urinary calcium (Ca) as a function of creatinine excretion (Ca/Cr) and of glomerular filtration rate (Ca/GFR) in postmenopausal women. Fasting urinary calcium, urinary Cr and GFR were measured in 18 women aged 54 to 91 years before and after six days of a calcium (400 mg/die) and sodium (100 mEq/die) restricted diet with a controlled content of proteins, lipids and glucides. Aged (over 64 y.) women having an adequate vitamin D status showed fasting urinary Ca/Cr and Ca/GFR after the controlled diet significantly lower than those showed before. It is concluded that fasting Ca/Cr and Ca/GFR may be nutrition-dependent. A revision of the significance of the fasting urinary Ca excretion is consequently suggested.
authors.affiliation: Clinica Ortopedica, Univesità degli Studi di Milano.
authors.forename: A
authors.initials: A
authors.lastname: Rubinacci
authors.forename: S
authors.initials: S
authors.lastname: Lodigiani
authors.forename: P
authors.initials: P
authors.lastname: Sirtori
authors.forename: L
authors.initials: L
authors.lastname: Tessari
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002118:Calcium / Q000652:urine*; D003404:Creatinine / Q000652:urine; D005215:Fasting; D005260:Female; D005919:Glomerular Filtration Rate; D006801:Humans; D008593:Menopause; D008875:Middle Aged; D009747:Nutritional Physiological Phenomena; D010281:Parathyroid Hormone / Q000097:blood; D013054:Spectrophotometry, Atomic; D014807:Vitamin D / Q000097:blood*
chemical_list: D010281:Parathyroid Hormone; D014807:Vitamin D; D003404:Creatinine; D002118:Calcium
vernacular_title: Influenza della nutrizione, dell'età e dell'assetto vitaminico D sull'escrezione urinaria del calcio a digiuno nelle donne in menopausa.