The association between vitamin D deficiency and metabolic syndrome in Ukrainian adolescents with overweight and obesity

Abstract

Purpose This work aims to determine the association between vitamin D deficiency and metabolic syndrome in overweight and obese adolescents from Ukraine. Methods Anthropometric measurements were taken and general and biochemical examinations were performed on 136 obese and overweight adolescents and 60 adolescents with normal body weight. The vitamin D status was determined using 25-hydroxyvitamin D (25(OH)D) (calcidiol) levels in blood serum. To establish the factors influencing vitamin D status, the subjects were asked to answer a questionnaire and 2007 International Diabetes Federation diagnostic criteria were used to determine the incidence of metabolic syndrome. All research results were processed statistically. Results A calcidiol sufficiency level was found in 3.9% of obese adolescents and 6.7% of overweight adolescents. Metabolic syndrome was found in 64.4% of obese adolescents with vitamin D deficiency, and in 26.2% of overweight adolescents. Factors associated with an increased risk of developing vitamin D deficiency in adolescents with metabolic syndrome included male sex (P=0.042), low income per family member (P=0.040), daily milk consumption of up to 1 cup per day (P=0.001), physical activity (P=0.001), duration of outdoor stays (P=0.001), and passive rest in front of a computer or television (P=0.001). Adolescents with metabolic syndrome were found predominance of body mass index (P<0.001), waist circumference (P<0.001), fasting blood glucose level (P<0.001), and decreased calcidiol level (P=0.022). Among metabolic syndrome components, vitamin D deficiency was strongly associated with waist circumference and increased fasting blood glucose (P<0.05). Conclusions Vitamin D deficiency is prevalent in overweight and obese adolescents from Ukraine. Vitamin D deficiency is associated with metabolic syndrome criteria in overweight and obese adolescents.

Keywords

• vitamin d
• adolescents
• overweight
• obesity
• metabolic syndrome