title: Urinary calcium and renal function in the Japanese female population.
abstract: The Japanese have not reached the recommended daily allowance (RDA) for calcium (Ca, 600 mg/day), they are a Ca-deficient population. To determine factors influencing urinary Ca (U-Ca) in the Ca-deficient female population, age, body mass index (BMI), drinking habits, smoking habits and Ca intake were surveyed, and urinary albumin (U-Alb) and retinol binding protein (U-RBP) as renal function tests were analyzed in 210 Japanese females aged 24-76 years. The mean Ca intake for the subjects was 542.8 mg/day, which was less than the RDA for Ca. A significant positive correlation was found between U-RBP and U-Ca, but neither age, BMI, drinking habits, smoking habits, Ca intake nor U-Alb would affect U-Ca in the subjects. In a Ca-deficient status, a proximal tubular dysfunction may be a significant factor increasing Ca loss in urine, and may be a risk factor for osteoporosis.
authors.affiliation: Department of Public Health, Gifu University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nagaya
authors.forename: A
authors.initials: A
authors.lastname: Takahashi
authors.forename: I
authors.initials: I
authors.lastname: Yoshida
authors.forename: Y
authors.initials: Y
authors.lastname: Usui
authors.forename: Y
authors.initials: Y
authors.lastname: Okamoto
mesh_terms: D000328:Adult; D000368:Aged; D002118:Calcium / Q000172:deficiency / Q000652:urine*; D004032:Diet; D005260:Female; D006801:Humans; D007564:Japan; D008875:Middle Aged; D012177:Retinol-Binding Proteins / Q000652:urine
chemical_list: D012177:Retinol-Binding Proteins; D002118:Calcium