P543 - UNPACKING THE LINK BETWEEN PHASE ANGLE AND BODY COMPOSITION IN CLINICAL SETTING

P543

UNPACKING THE LINK BETWEEN PHASE ANGLE AND BODY COMPOSITION IN CLINICAL SETTING

C. Maza^1,*, D. Simancas-Racines², C. Reytor-Gonzalez², M. Campuzano-Donoso², J. Cagua-Ordoñez², E. Frias-Toral^3,4

¹División de Educación Universitaria e Investigación, Centro Medico Militar, Guatemala, Guatemala, ²Facultad de Ciencias de la Salud, Universidad UTE, Quito, Ecuador, ³Division of Research, Texas State University, San arcos, United States, ⁴Facultad de Medicina, Universidad Catolica de Santiago de Guayaquil, Guayaquil, Ecuador

 

Rationale: This study investigates the relationship between phase angle and body composition in hospitalized adults, aiming to determine how parameters like fat mass and total body water influence cellular integrity.

 

Methods: Observational, cross-sectional study analyzed anthropometric and body composition data from hospitalized adults (≥18 years) to examine the relationship between phase angle and body composition. Inclusion required complete data on variables such as age, sex, BMI, fat mass, total body water, and phase angle, measured via multifrequency bioimpedance. Outliers were excluded. Statistical analyses included descriptive measures, t-tests for sex comparisons, and ANOVA with post hoc tests for BMI category differences. The study aimed to explore associations, not evaluate interventions or compare disease groups.

 

Results: Women had significantly higher BMI and fat mass than men, but similar age and total body water; obesity rates differed. Phase angle showed no significant differences by sex or BMI category and was not linearly associated with fat mass or total body water. A regression model including body composition variables explained only 9.4% of phase angle variability, with total body water showing a marginal association. 

 

Variable	Female (n=35)	Male (n=43)
BMI (Kg/m2)*	26.67 (23.89 -36.63)	23.35 (19.2-24.8)
Fat mass (Kg)*	16.88 (11.54 -25.72)	8.95 (1.96-16.49)
Total Body Water (L)*	37.5 (30.92-42.8)	38.18 (31.57-47.3)
Phase Angle*	3.1 (2.3-3.6)	3.1 (2.2-4.5)

* Median and interquartile range (p25–p75)

Conclusion: In this study, phase angle, as a functional biomarker derived from electrical bioimpedance, showed no significant differences between sexes or between body mass index categories, despite the presence of marked variations in body composition.

References: Alves, E. A. S., et al. (2023). "Phase Angle and COVID-19: A Systematic Review with Meta-Analysis." Clinical Nutrition ESPEN, 52, 1–9.

 

Disclosure of Interest: None declared