Low muscular mass and overestimation of microalbuminuria by urinary albumin/creatinine ratio

Massimo Cirillo, Martino Laurenzi, Mario Mancini, Alberto Zanchetti, Natale G. De Santo

Research output: Contribution to journalArticle

Abstract

Microalbuminuria is a mild urinary albumin elevation and is associated with cardiovascular disease. Urinary albumin/creatinine ratio is recommended for microalbuminuria assessment, because it reflects urinary albumin excretion. Muscular mass could affect albumin/creatinine ratio, because urinary creatinine reflects muscular mass. The study investigated high albumin/creatinine ratio attributed to low urinary creatinine without microalbuminuria. The Gubbio Population Study for ages 45 to 64 collected data on weight, skinfold, urinary albumin, urinary creatinine, and coronary heart disease. Weight and skinfold thickness were used to calculate fat and nonfat mass and urinary creatinine as a marker of muscular mass. Microalbuminuria was defined as urinary albumin of 20 to 199 μg/min and high albumin/creatinine ratio as a ratio of 17 to 250 μg/mg in men and of 25 to 355 μg/mg in women. Persons with macroalbuminuria (urinary albumin ≥200 μg/min) were excluded to focus analyses on microalbuminuria. Coronary heart disease was defined by ECG and questionnaire. The target cohort consisted of 1623 men and women, ages 45 to 64. Prevalence was 8.5% for high albumin/creatinine ratio (n=138), 4.3% for microalbuminuria (n=69), 5.2% for high albumin/creatinine ratio without microalbuminuria (n=85), and 1.0% for nonhigh albumin/creatinine ratio with microalbuminuria (n=16). High albumin/creatinine ratio without microalbuminuria was inversely associated with nonfat mass and urinary creatinine (P

Original languageEnglish
Pages (from-to)56-61
Number of pages6
JournalHypertension
Volume47
Issue number1
DOIs
Publication statusPublished - Jan 2006

Keywords

  • Albuminuria
  • Body mass
  • Coronary disease
  • Muscles

ASJC Scopus subject areas

  • Internal Medicine

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