Equation models developed with bioelectric impedance analysis tools to assess muscle mass: A systematic review.

Background & Aims: This systematic review aims to systematically assess and summarize the equation models developed to estimate muscle mass with bioelectric impedance analysis (BIA) instruments against a reference instrument (DXA, MRI, CT-scan, Ultrasonography), in order to help researchers and clinicians choose the most adapted equation, depending on the device and the population in question.

Methods: The Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) statement was followed. Medline (via Ovid) and Scopus were searched in January 2019 for observational (transversal, longitudinal, retrospective) studies developing an equation prediction model to validate BIA against another reference method for the assessment of muscle mass.

Three-Year Adverse Health Consequences of Sarcopenia in Community-Dwelling Older Adults According to 5 Diagnosis Definitions.

Objectives: To assess the occurrence of 3 major adverse outcomes of sarcopenia (ie, physical disabilities, institutionalizations and deaths) observed over a 3-year follow-up in older adults and compare the risk of these outcomes using 5 definitions of sarcopenia.

Design: The study is a part of the ongoing SarcoPhAge (for Sarcopenia and Physical Impairment with advancing Age) longitudinal project.

Setting And Participants: The SarcoPhAge study follows 534 community-dwelling older adults.