Investigation of Vitamin D Levels in Children Aged 0–4 Years in Yunnan Province
Abstract Aim: To investigate the vitamin D levels in children aged 0–4 years in Yunnan Province.Methods: This study selected children aged 0 to 4 years who underwent physical examination in the special needs clinic of the Hospital from October 2019 to December 2020 as subjects to analyze serum 25(OH)D levels.Result: Vitamin D deficiency was more common in girls than in boys. There was no significant difference in serum vitamin D levels between boys and girls at any age. However, there was a significant decrease in vitamin D levels after 2 years old in all chidren at all ages. The levels of vitamin D in children were highest in summer, which were significantly higher than other seasons, and were lowest in winter. At the same time, vitamin D levels were significantly different based on the economic level of cities. The serum vitamin D contents of infants and young children in the top five cities with the highest economic levels were significantly higher than in lower-ranked cities. There was a significant correlation between vitamin D content and serum calcium. Conclusion: This study preliminarily determined a reasonable reference range for serum 25 hydroxyvitamin D content in infants aged 0–4 years in Yunnan Province. Which will be of significance for the establishment of official guidelines on vitamin D supplementation in infants and young children in Yunnan and for policy formulation.