However, the association of low creatinine levels with functional limitation suggests that creatinine levels are influenced by factors other than kidney function and muscle mass in the elderly.PMID: 19181716 [PubMed - indexed for MEDLINE] PMCID: PMC2655007 Free PMC ArticleShareImages from this publication.See all images (1)Free textFigure 1.Prevalence (?? standard error) of functional limitation b