Correlation between phase angle, body composition, and bioelectrical impedance vector analysis in older adults

Authors

  • Rafaela de Siqueira Oliveira Federal University of Sergipe
  • Andréa Costa Goes Federal University of Sergipe
  • Mylena Alves Santos Federal University of Sergipe
  • Juliana de Souza Oliveira Federal University of Sergipe
  • Andrêa Jacqueline Fortes Ferreira Iyaleta, Pesquisa, Ciências e Humanidades
  • Emanuelle Cruz da Silva Santiago Federal University of Bahia
  • Anna Karla Carneiro Roriz Federal University of Bahia
  • Carolina Cunha de Oliveira Universidade Federal de Sergipe/Departamento de Nutrião

DOI:

https://doi.org/10.14808/sci.plena.2025.056501

Keywords:

body composition, Electric Impedance, older adults

Abstract

Few studies have examined the relation of phase angle (PhA) with body composition and the bioelectrical impedance vector analysis (BIVA) in older adults. The objective of this study was to investigate the correlation between PhA and body composition in community-dwelling older adults and to identify the PhA classification in the position on the RXc graph. A cross-sectional study was conducted with 144 older adults of both sexes. The body composition indicators evaluated included fat-free mass (FFM), fat-free mass percentage (FFM%), skeletal muscle index (SMI), total body water (TBW), body fat (BF), and body fat percentage (BF%). A comparative analysis of PhA and BIVA was also conducted. PhA exhibited an inverse proportional correlation with age, BF%, and TBW, as well as a positive correlation with FFM, FFM%, and SMI (p < 0.05). Individuals with PhA < 5º exhibited higher mean age, FFM, TBW, and SMI (p < 0.05). An evaluation of BIVA revealed that subjects exhibiting a lower PhA were predominantly located in the lower right quadrants for specific tolerance, indicative of a thin body and cachexia. The findings of this study indicated a correlation between PhA and various body composition markers, including FFM, FFM%, BF%, TBW, and SMI. The data presented in the RXc graph demonstrated that older adults with lower PhA were characterized as thin and cachectic. PhA and BIVA have been identified as potential parameters that could facilitate the mapping of nutritional status among older adults.

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Published

2025-06-15

How to Cite

de Siqueira Oliveira, R., Costa Goes, A., Alves Santos, M., de Souza Oliveira, J., Fortes Ferreira, A. J. ., Cruz da Silva Santiago, E. ., … Cunha de Oliveira, C. (2025). Correlation between phase angle, body composition, and bioelectrical impedance vector analysis in older adults. Scientia Plena, 21(5). https://doi.org/10.14808/sci.plena.2025.056501

Issue

Vol. 21 No. 5 (2025): Maio/May 2025

Section

Articles

License

Copyright (c) 2025 Rafaela de Siqueira Oliveira, Andréa Costa Goes, Mylena Alves Santos, Juliana de Souza Oliveira, Andrêa Jacqueline Fortes Ferreira, Emanuelle Cruz da Silva Santiago, Anna Karla Carneiro Roriz, Carolina Cunha de Oliveira

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