ECEESPE2025 ePoster Presentations Metabolism, Nutrition and Obesity (164 abstracts)
Phase angle as a predictor of nutritional status in middle-aged obese patients
Sana Khamassi 1 , Fatma Boukhayatia 1 , Haifa Abdesselem 1 , Emna Bornaz 1 , Kamilia Ounaissa 1 , Nesrine Dhieb 2 , Sana Hammami 3 , Houda Bouhajja 4 , Amel Gammoudi 2 , Awatef Kacem 2 , Emna Talbi 4 , Jamoussi Henda 2 & Chiraz Amrouche 1
1National Institute of Nutrition and Food Technology, Department of Nutritional Diseases D, Tunis, Tunisia; 2National Institute of Nutrition and Food Technology, Obesity Reserach Unit, Tunis, Tunisia; 3National Institute of Nutrition and Food Technology, Clinical Biology Laboratory, Tunis, Tunisia; 4National Institute of Nutrition and Food Technology, UR17SP01-Clinical Biology Laboratory, Tunis, Tunisia
JOINT3338
Background: In the context of obesity, phase angle (PhA) is considered a potential marker for evaluating health status and monitoring weight loss interventions [1]. Research has shown that higher PhA values are associated with improved nutritional status. The aim of our study was to evaluate the relationship between PhA and nutritional status in obese patients.
Methods: This is a cross-sectional study conducted on 100 obese patients. Body composition was assessed using SECA MBCA 515 bioimpedance and low PhA was defined as < 6°. Muscle strength was assessed by measuring grip strength using a digital dynamometer. Dietary survey data were analyzed using Nutrilog software.
Results: The mean age was 44.42±13.25 years, with female predominance (90%). The mean BMI was 40.07±5.77kg/m². The mean fat mass and fat mass index values were 52.50±12.39kg and 19.74±4.03kg/m², respectively. The average PhA was 5.11±0.54° and the majority of patients had a low PhA (94%). Specifically, 56% of patients had a PhA between 5 and 6, 35% had a PhA between 4 and 5, only one patient had a PhA below 4, and 6% had a PhA above 6. PhA showed a positive correlation with skeletal muscle mass (r = 0.30; P = 0.002), appendicular muscle mass (r = 0.25; P = 0.012), fat-free mass (r = 0.25; P = 0.011), and muscle strength (r = 0.45; P = 0.015). Additionally, PhA was inversely correlated with fat mass (r=-0.48; P <0.0001). The nutritional biological assessment revealed a positive correlation with albumin levels (r = 0.26; P = 0.009). The dietary survey indicated a positive correlation between daily protein intake and PhA (r = 0.27; P = 0.006), with significant correlations for both animal proteins (P = 0.015) and plant-based proteins (P = 0.04). Furthermore, the analysis of micronutrient intake revealed positive correlations between PhA and the intake of several micronutrients, including vitamin B3 (r = 0.20; P = 0.047), vitamin B5 (r = 0.22; P = 0.039), vitamin B6 (r = 0.23; P = 0.021), vitamin B12 (r = 0.20; P = 0.049), calcium (r = 0.25; P = 0.012), phosphorus (r = 0.26; P = 0.01), and iron (r = 0.20; P = 0.049).
Conclusion: The findings of our study suggest that PhA may serve as a useful marker for assessing nutritional health and guiding interventions in obesity management.
References: 1. Cancello R, Brunani A, Brenna E, Soranna D, Bertoli S, Zambon A, et al. Phase angle (PhA) in overweight and obesity: evidence of applicability from diagnosis to weight changes in obesity treatment. Rev Endocr Metab Disord 2023;24:451-64.
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