Assessment of vitamin D status and parathyroid hormone during a combined intervention for the treatment of childhood obesity
Longitudinal study
Vitamin D
BMI status
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Springer Science and Business Media LLC
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Durá-Travé, T. (Teodoro); Gallinas-Victoriano, F. (Fidel); Chueca-Guindulain, M.J. (María Jesús); et al. "Assessment of vitamin D status and parathyroid hormone during a combined intervention for the treatment of childhood obesity". Nutrition & Diabetes. 9 (18), 2019, 2019
Background: Obesity is associated with vitamin D deficiency. The aim of this work is to analyze the changes in vitamin D status and PTH levels in a group of children with obesity receiving combined intervention program in order to get BMI status reduction. Methods: Longitudinal study in 119 children with obesity, aged 9.1–13.9 years, included in a 1-year combined dietarybehavioral-physical activity intervention. Anthropometric measurements (weight, height, BMI and fat mass index) were registered every 3 months and blood testing (calcium, phosphorous, 25(OH)D and PTH) were collected at the beginning and after 12 months of follow-up. A control group was recruited (300 healthy children, aged 8.1–13.9 years). The criteria of the US Endocrine Society were used for the definition of hypovitaminosis D. Results: Vitamin D deficiency was significantly higher in obesity group (31.1 vs. 14%). There was negative correlation between 25(OH)D and fat mass index (r = −0.361, p = 0.001). Patients with BMI reduction throughout combined intervention were 52 (43.7%). There was a significant increase in the prevalence of hypovitaminosis D in patients without BMI reduction at the end of follow-up, but in those patients with BMI reduction there was no changes of vitamin D status. Conclusions: Obesity increases the prevalence of suboptimal vitamin D status, and a BMI status reduction in children with obesity may be required to at least stabilize vitamin D status.

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