Observational studyRevista paulista de pediatria : orgao oficial da Sociedade de Pediatria de Sao Paulo2020
BIOELECTRICAL VECTOR ANALYSIS IN OBESE ADOLESCENTS.
Observational study in Revista paulista de pediatria : orgao oficial da Sociedade de Pediatria de Sao Paulo, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.
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4 citing papers in PubMed, 1 synthesis or guideline pooled it, 5 citations in OpenAlex.
- Phase Angle as a Potential Screening Tool in Adults with Metabolic Diseases in Clinical Practice: A Systematic Review.International journal of environmental research and public health · 2023Pooled it
- Segmental BIA-derived body composition in children and adolescents aged 5-18 years: age- and sex-specific reference values and limitations in obesity.European journal of clinical nutrition · 2026Article
- The science of bioelectrical impedance-derived phase angle: insights from body composition in youth.Reviews in endocrine & metabolic disorders · 2025Review
- Association between BMI z-score and body composition indexes with blood pressure and grip strength in school-age children: a cross-sectional study.Scientific reports · 2024Article
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Authors and funding
7 authors at 5 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTo evaluate the hydration of obese and non-obese adolescents by vectorial bioimpedance analysis, in addition to verifying the associations between obesity and bioelectrical impedance vectorial analysis (BIVA) parameters.
methodsA cross-sectional study with adolescents between 14 and 18 years old (n=489, 300 boys and 189 girls). Electric bioimpedance (BIA; Quantum_II, RJL system, Rome, Italy) provided resistance and reactance parameters to calculate phase angle (PA), fat-free mass (FFM) and body fat (%BF). The confidence ellipses were compared, and the construction of the tolerance ellipses allowed individual and qualitative evaluation of the vectors and classification in dehydrated, normohydrated and hyperhydrated.
results78 obese and 411 eutrophic adolescents participated. Resistance (p<0.001) and reactance (p<0.001) and their normalization by stature (p<0.001) were reduced in the obese, whereas the PA was higher (p=0.003). %BF was 11.3% higher in obese adolescents. The main vector of the obese, both male (D=1.38; p<0.001) and female (D=1.49; p<0.001), indicated greater hydration. The ellipse of tolerance of the total sample showed that 25 (32.1%) were hyperhydrated and 02 (2.6%) vectors positioned in the sense of dehydration. A total of 17 (53.2%) girls and 16 (34.8%) boys were hyperhydrated. Logistic regression showed an inverse relation of BMI with resistance (p<0.001), reactance (p<0.001) and both normalized by stature. Adolescents with increased PA (p<0.001) were twice as likely to present obesity.
conclusionsObese adolescents were hyperhydrated and there was an inverse relationship of BMI with resistance and direct with PA.
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