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Bioelectrical impedance vector analysis for evaluating zinc supplementation in prepubertal and healthy children.

Dantas MM, Rocha ÉD, Brito NJ, Alves CX, França MC, das Graças Almeida M, Brandão-Neto J - Food Nutr Res (2015)

Bottom Line: The body mass index-for-age increased after oral zinc supplementation in the EG (p=0.005).After analyses of BIVA ellipses, we observed that this method could detect improvements in body composition in healthy children supplemented with zinc.These results suggest that BIVA could be an auxiliary method for studying a small population undergoing zinc intervention.

View Article: PubMed Central - PubMed

Affiliation: Department of Internal Medicine, Postgraduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, Brazil.

ABSTRACT

Background: The prevalence of abnormal nutritional status has increased in children and adolescents. Nutritional assessment is important for monitoring the health and nutritional status. Bioelectrical impedance vector analysis (BIVA) combines changes in tissue hydration and structure and body composition that can be assessed.

Objectives: The objective of this study was to use BIVA to evaluate nutritional status in 60 prepubertal children, aged between 8 and 9 years, supplemented with zinc, to detect possible changes in body composition.

Design: We performed a randomized, controlled, triple-blind study. The children were divided into the control group (CG; sorbitol 10%, n=29) or the experimental group (EG; 10 mg Zn/day, n=31), and the duration of the experiment was 3 months. Anthropometric assessments were performed for all of the children.

Results: The body mass index-for-age increased after oral zinc supplementation in the EG (p=0.005). BIVA indicated that the CG demonstrated a tendency for dehydration and decreased soft tissue and the EG demonstrated a tendency for increased soft tissue, primarily the fat-free mass. After analyses of BIVA ellipses, we observed that this method could detect improvements in body composition in healthy children supplemented with zinc.

Conclusions: These results suggest that BIVA could be an auxiliary method for studying a small population undergoing zinc intervention.

No MeSH data available.


Related in: MedlinePlus

The 95% confidence ellipses of impedance vectors measured by the difference between before and after placebo (control group) and before and after zinc supplementation (experimental group).
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Figure 0001: The 95% confidence ellipses of impedance vectors measured by the difference between before and after placebo (control group) and before and after zinc supplementation (experimental group).

Mentions: The mean vectors for the CG and EG were plotted before and after placebo and supplementation. The 95% confidence ellipses of the three mean vectors of each group overlapped, which indicates that the position between the vectors at the CG, EG, and reference population (healthy Italian children) were not significantly different in the RXc plane. The paired one-sample Hotelling's T2 test indicated a difference in the mean vectors between the first measurement (before placebo or supplementation) and the second measurement (after placebo or supplementation). The EG had increased in the soft tissue (primarily FFM) body composition after oral zinc supplementation compared with before supplementation (p<0.0001). However, the p value of the paired one-sample Hotelling's T2 test for the CG was 0.9 (Fig. 1).


Bioelectrical impedance vector analysis for evaluating zinc supplementation in prepubertal and healthy children.

Dantas MM, Rocha ÉD, Brito NJ, Alves CX, França MC, das Graças Almeida M, Brandão-Neto J - Food Nutr Res (2015)

The 95% confidence ellipses of impedance vectors measured by the difference between before and after placebo (control group) and before and after zinc supplementation (experimental group).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4590407&req=5

Figure 0001: The 95% confidence ellipses of impedance vectors measured by the difference between before and after placebo (control group) and before and after zinc supplementation (experimental group).
Mentions: The mean vectors for the CG and EG were plotted before and after placebo and supplementation. The 95% confidence ellipses of the three mean vectors of each group overlapped, which indicates that the position between the vectors at the CG, EG, and reference population (healthy Italian children) were not significantly different in the RXc plane. The paired one-sample Hotelling's T2 test indicated a difference in the mean vectors between the first measurement (before placebo or supplementation) and the second measurement (after placebo or supplementation). The EG had increased in the soft tissue (primarily FFM) body composition after oral zinc supplementation compared with before supplementation (p<0.0001). However, the p value of the paired one-sample Hotelling's T2 test for the CG was 0.9 (Fig. 1).

Bottom Line: The body mass index-for-age increased after oral zinc supplementation in the EG (p=0.005).After analyses of BIVA ellipses, we observed that this method could detect improvements in body composition in healthy children supplemented with zinc.These results suggest that BIVA could be an auxiliary method for studying a small population undergoing zinc intervention.

View Article: PubMed Central - PubMed

Affiliation: Department of Internal Medicine, Postgraduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, Brazil.

ABSTRACT

Background: The prevalence of abnormal nutritional status has increased in children and adolescents. Nutritional assessment is important for monitoring the health and nutritional status. Bioelectrical impedance vector analysis (BIVA) combines changes in tissue hydration and structure and body composition that can be assessed.

Objectives: The objective of this study was to use BIVA to evaluate nutritional status in 60 prepubertal children, aged between 8 and 9 years, supplemented with zinc, to detect possible changes in body composition.

Design: We performed a randomized, controlled, triple-blind study. The children were divided into the control group (CG; sorbitol 10%, n=29) or the experimental group (EG; 10 mg Zn/day, n=31), and the duration of the experiment was 3 months. Anthropometric assessments were performed for all of the children.

Results: The body mass index-for-age increased after oral zinc supplementation in the EG (p=0.005). BIVA indicated that the CG demonstrated a tendency for dehydration and decreased soft tissue and the EG demonstrated a tendency for increased soft tissue, primarily the fat-free mass. After analyses of BIVA ellipses, we observed that this method could detect improvements in body composition in healthy children supplemented with zinc.

Conclusions: These results suggest that BIVA could be an auxiliary method for studying a small population undergoing zinc intervention.

No MeSH data available.


Related in: MedlinePlus