P837 - RELATIONSHIP BETWEEN BIOELECTRICAL IMPEDANCE VECTOR ANALYSIS AND ABDOMINAL OBESITY IN PATIENTS WITH OVERWEIGHT AND OBESITY

P837

RELATIONSHIP BETWEEN BIOELECTRICAL IMPEDANCE VECTOR ANALYSIS AND ABDOMINAL OBESITY IN PATIENTS WITH OVERWEIGHT AND OBESITY

A. Guerrini^1,2,*, L. Di Francesco¹, C. Di Rosa¹, C. Spiezia¹, B. Fava¹, M. Siotto², I. G. Aprile², Y. M. Khazrai¹

¹Department of Science and Technology for Humans and the Environment, Università Campus Bio-Medico di Roma, Rome, ²IRCCS Fondazione Don Carlo Gnocchi ONLUS, Florence, Italy

Rationale: Abdominal obesity, marked by excess fat accumulation in the abdominal region, is a well-known risk factor for both metabolic and cardiovascular diseases. Accurate assessment of body composition is crucial for its prevention and management. Bioelectrical Impedance Vector Analysis (BIVA) provides a qualitative evaluation of body composition and hydration status. However, its link with abdominal obesity remains underexplored. This study aims to investigate the relationship between BIVA and abdominal obesity in individuals with overweight and obesity. 

Methods: This retrospective study included 149 patients (72% women; mean age 50 ± 14 years; mean BMI 32 ± 5 kg/m²) undergoing weight management at the University Hospital Campus Bio-Medico of Rome. Anthropometric data, clinical information, and BIVA parameters were collected. Abdominal obesity was defined according to WHO criteria, based on waist circumference (WC ≥ 88 cm for women; WC ≥ 102 cm for men) or waist-to-hip ratio (WHR ≥ 0.80 for women, WHR ≥ 0.95 for men). 

Results: The mean WC was 90.7 ± 12.1 cm in women and 104.4 ± 10.2 cm in men, while mean WHR values were 0.81 ± 0.07 and 0.95 ± 0.07, respectively. Abdominal obesity prevalence was 60% based on WC and 48% based on WHR.

Patients with abdominal obesity had a significantly lower fat-free mass (p <0.05) and higher fat mass (p < 0.05). BIVA effectively distinguished between individuals with and without abdominal obesity according to both WC (T² = 12.5; F = 6.2; p < 0.001) and WHR (T² = 20.2; F = 10; p < 0.001) criteria. Notably, individuals with abdominal obesity showed a leftward and downward shift of the their bioimpedance vector, indicating increased extracellular fluid and a reduced cellular quality.

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Conclusion: BIVA effectively distinguishes individuals with and without abdominal obesity, highlighting its potential as a valuable tool for body composition assessment.

Disclosure of Interest: None declared