Clinical calculator for calculating appendicular musculoskeletal mass of elderly patients according to anthropometry and bioimpedance analysis

Objective: development of an applied clinical calculator for calculating the appendicular mass of skeletal muscles (ASMM Calculator) in elderly patients based on bioimpedance analysis of body composition and anthropometry.

Material and methods: the algorithm of the ASMM Calculator was developed based on the analysis of the results of a single-stage crosssectional study of G. Sergi (Department of Geriatrics, University of Padua, Italy); the calculation of appendicular musculoskeletal mass and its index is based on the values of anthropometry and bioimpedance analysis of body composition.

Results:the matrix of the ASMM Calculator allows you to determine objective quantitative criteria for sarcopenia (appendicular musculoskeletal mass and its index) based on the values of five independent variables: the patient’s gender; height and body weight, electrical and reactive esistance of the body, the program provides for use directly in outpatient admission, has a volume of 12 kB, does not require specific hardware and software means, can be installed on a mobile device.

Conclusions: the use of the ASMM calculator in clinical practice allows the doctor to establish diagnostic criteria for sarcopenia in a timely manner, does not require significant professional time, provides grounds for verifying the diagnosis in accordance with the principles of evidence-based medicine; the program can be integrated into various medical information systems as a module of the medical decision support system.

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