Phase angle as a screening method for sarcopenia in community-dwelling older adults

Abstract

Objective We investigated the utility of the phase angle as a screening tool for sarcopenia. Methods We performed a cross-sectional study that included 169 active community-dwelling elderly women. The phase angle was determined using tetrapolar bioelectrical impedance, and sarcopenia was diagnosed based on skeletal muscle mass, muscle strength, and physical performance using bioelectrical impedance analysis, a handheld dynamometer, and the gait speed test, respectively. Receiver operating characteristic curve analysis was performed to investigate the role of the phase angle as a predictor of sarcopenia. Results The prevalence of sarcopenia was 12.4%. The median phase angle was 5.30°; elderly women with sarcopenia had lower phase angles than those without sarcopenia (p=0.006). The phase angle cutoff for the detection of sarcopenia was ?5.15°, with an area under the curve of 0.685, sensitivity 81.0%, specificity 60.8%, and accuracy 63.31%. Elderly women with a low phase angle show a high risk of presenting with reduced muscle mass. Conclusions The phase angle was shown to be a useful screening tool in elderly women with sarcopenia.

Association between sarcopenia and risk of major adverse cardiac and cerebrovascular events‐UK Biobank database

“…Using BIA data, we first calculated the whole body SMM using the Janssen equation. 18 We then calculated the SMI using the following formula 1,5,19,20 : SMI = SMM/height 2 , where SMM is expressed in kg, and height in meters.…”

Association Between Sarcopenia and Fracture Risk in a Population From the UK Biobank Database

“…Using BIA data, we first calculated the whole-body SMM using the Janssen equation. (8) We then calculated the SMI using the following formula: (1,9,21,22) SMI = SMM/height 2 , where SMM is expressed in kg, and height in meters. SMI values were considered pathological if they were less than 5.5 kg/m 2 in women and 7.0 kg/m 2 in men.…”