Introduction
malignant tumors, vascular diseases, Loss of skeletal muscle mass
INFECTIOUS DISEASES, HEMATOLOGICAL DISEASES, CHRONIC DISEASES, MALIGNANT TUMORS, VASCULAR DISEASES, LOSS OF SKELETAL MUSCLE MASS, METABOLIC DISORDERS, DISEASES
Loss of skeletal muscle mass and its function is one of the main reasons why the elderly suffer from many acute and chronic diseases. These diseases include endocrine, metabolic disorders, infectious diseases, immune diseases, vascular diseases, hematological diseases and malignant tumors [Trunk muscles provide a key support mechanism in maintaining body stability and balance during limb movement [Core muscle cross-sectional area (CSA) can be used as an important indicator of health status in morphometric analysis [Muscles can be divided into surface muscles and deep muscles. The psoas major is a deep muscle. Deep muscles cannot be measured by contact, and only electronic signal processing and imaging techniques can be used to diagnose or quantify deep muscles. Numerous studies have provided substantial data on the size and anatomical variability of the psoas major [For the past three decades, BIA has been widely used for the estimation of body composition in various fields, including sports science, clinical research, health care and other fields, due to its advantages of convenience, non-invasiveness, and rapid results [In view of the above problems, this study intended to use the CSA of the psoas major muscle of the core muscle group as the estimation target. Variables such as anthropometric measurements and BIA measurements were used as predictors. The study purpose was to establish and validate an estimation model for the area of the psoas major in older adults.