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4 . 2021

Assessment of relationship of lipid and carbon profile indicators with vitamin D supply in children depending on body mass index

Abstract

Overweight children represent a particularly vulnerable group for hypovitaminosis D. Clinical studies on the relationship between vitamin D (VD) deficiency and metabolic risk factors for cardiovascular disorders are controversial, and for children of primary school age who have overweight and obesity are insufficient.

The aim of the research was to study the relationship between lipid and carbohydrate metabolism indicators and VD status in children, depending on the body mass index.

Material and methods. A cross-sectional (one-step) study was carried out on a sample of 154 children with different weight of 8-10 years old (74 girls, 80 boys). Three groups of research participants were identified: group 1 - 44 obese, group 2 - 58 overweight, group 3 - 52 children with normal body weight. For all children, the serum level of 25(OH)D, parathyroid hormone (PTH), calcium (Ca), phosphorus (P), alanine aminotransferase (ALT), aspartate aminotransferase (AST), total cholesterol (TC), triglycerides (TG), β-lipoproteins, glucose, insulin was determined, and Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) was also calculated.

Results. VD deficiency in obese children was found almost 2.3 fold more often than in overweight (p=0.002) and 2.8 fold more often than in children with normal body weight (p=0.001). Indicators of lipid and carbohydrate metabolism were within physiological limits. However, in obese children they significantly exceeded the indicator of healthy children (p<0.05). When comparing the results of biochemical studies, it was revealed that children with VD deficiency [25(OH)D <20 ng/ml] had statistically significantly higher medians of PTH, TC, TG, ALT, AST, glucose, insulin, HOMA-IR and lower P and Ca level compared with children with normal micronutrient blood content (p<0.05). The medians of ALT, AST, TC, β-lipoproteins, TG, glucose, insulin and HOMA-IR levels in obese children with VD deficiency were statistically significantly higher than in children with normal body weight and VD deficiency and in healthy children with an optimal concentration of 25(OH)D. At the same time, there was no statistically significant difference between the indicators of lipid and carbohydrate metabolism in the group of healthy children with normal VD status and its deficiency.

Conclusion. VD deficiency is an important predictor of obesity complications and it exacerbates the risk of cardiometabolic disorders in children who are obese in the early school years.

Keywords:children, obesity, vitamin D, vitamin D deficiency, cardiometabolic disorders

Funding. The study was not sponsored.

Conflict of interest. The authors declare no conflict of interest.

For citation: Belykh N.A., Blokhova E.E., Lebedeva I.N., Nikiforov A.A., Khlyntseva K.V., Nikiforova L.V. Assessment of relationship of lipid and carbon profile indicators with vitamin D supply in children depending on body mass index. Voprosy pitaniia [Problems of Nutrition]. 2021; 90 (4): 112-21. DOI: https://doi.org/10.33029/0042-8833-2021-90-4-112-121 (in Russian)

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CHIEF EDITOR
CHIEF EDITOR
Viktor A. Tutelyan
Full Member of the Russian Academy of Sciences, Doctor of Medical Sciences, Professor, Scientific Director of the Federal Research Centre of Nutrition, Biotechnology and Food Safety (Moscow, Russia)

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