title: Relationship of posture and age to urinary protein excretion.
abstract: The influence of posture and age on urinary protein excretion was studied in 120 normal men volunteers. The supine excretion rate was less than 140 mug/min in all but two people (median value 38 mug/min) and tended to increase with age. The excretion rate decreased on quiet standing in 80% of people, which corresponded to a fall in creatinine-clearance. In the remaining 20% protein excretion increased on standing but generally remained within normal limits and was dissociated from changes in creatinine clearances. This increase was more prevalent in younger people and may represent a phenomenon analogous to orthostatic proteinuria, differing only quantitatively.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000419:Albuminuria; D002648:Child; D003404:Creatinine / Q000652:urine; D006801:Humans; D005779:Immunodiffusion; D008297:Male; D011187:Posture; D011507:Proteinuria
chemical_list: D003404:Creatinine