AI Article Synopsis
- The study investigates how the bioimpedance analysis-derived phase angle (PhA) varies with age, sex, and body mass index (BMI) in individuals with different weight statuses, particularly focusing on those with obesity.
- It includes 1,877 participants, comparing 983 individuals with obesity to 894 controls, and measures their body composition and PhA readings.
- Findings reveal that men have a higher PhA than women, which declines with age, but no significant changes in PhA are linked to increases in BMI, except for values dropping in individuals with BMI greater than 50 kg/m².*
Article Abstract
Objective: Obesity is characterized not only by an increase of fat mass but also by alterations in skeletal muscle. Bioimpedance analysis (BIA)-derived phase angle (PhA) may provide specific information on the inherent characteristics of fat-free mass, and is widely used as an index of poor nutritional status. The aim of this study was to describe whether and to what extent PhA varies depending on age, sex, and body mass index (BMI) in individuals with different weight status.
Methods: We selected 1877 participants for this retrospective study (two weight status groups): 983 individuals with obesity (age 40 ± 13.9 y; BMI 39.5 ± 7.2 kg/m²) and 894 controls (age 40 ± 13.3 y; BMI 24.6 ± 2.7 kg/m²). Anthropometry and PhA at 50 kHz for the whole body were performed in all participants.
Results: PhA was greater in men than in women, although a decline of PhA was observed with age, which was linear in women and occurred in men after 40 y of age. On the other hand, no significant differences were observed with increasing BMI in either sex; lower values might be observed when BMI >50 kg/m².
Conclusions: A more detailed appraisal of BIA-derived PhA in obesity is reported in the present study, providing basic data that might be taken into consideration in prevention and clinical nutrition. Further studies are needed to explore differences of PhA in individuals with different weight status.
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Source |
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| http://dx.doi.org/10.1016/j.nut.2022.111960 | DOI Listing |
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