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The relationship between Physical Growth and Major Sources of Serum Vitamin D among Hospitalized Children of Changwon City
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Haeyoung Kang, Eunsil Her, Kyung Hea Lee
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Korean J Community Nutr 2015;20(3):197-207. Published online June 30, 2015
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DOI: https://doi.org/10.5720/kjcn.2015.20.3.197
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 Abstract
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- OBJECTIVES
This study was conducted to investigate the effects of the sources of vitamin D (duration of exposure to sunlight, intake of major food sources for vitamin D or vitamin D supplements) on the serum 25-(OH) D3 levels, and the physical growth of a child.
METHODS
Subjects were 296 children aged 1 to 5 years who visited S hospital located in Changwon City. Survey data collection was carried out by direct interview method, and the biochemical data were collected using hospital records.
RESULTS
The study subjects were divided into three groups according to their levels of serum 25-(OH) D3 (deficient, relatively insufficient, sufficient) and their percentage were 48.3%, 44.3% and 7.4% respectively. The average concentration of serum 25-(OH) D3 was 20.41 +/- 6.55 ng/mL, which was relatively insufficient. The average duration of exposure to sunlight was 58.86 +/- 49.18 minutes/day. A total score of vitamin D major food sources was 46.71 points (full marks 153), and the most frequently consumed food items were milk, eggs, and cheese. Thirty-four percent of the subjects took vitamin D supplements and their dose were 11.96 microg/day. Three vitamin D sources in sufficient group were higher than deficient or relatively insufficient group significantly. Intake of vitamin D supplements showed positive relation (+) and high explanation power (R2= 0.288) on serum 25-(OH) D3 concentration, but intake of vitamin D major food sources (+) and the duration of exposure to sunlight (+) had a low explanation power (R2= 0.068). The relations between serum 25-(OH) D3 concentration and physical growth (height and weight) were shown as negative (??, and their explanation powers were low as 7.3% and 5.9% respectively.
CONCLUSIONS
This study results can be useful when discussing the intake standard of vitamin D and the effective intake method for children. In addition, it will be helpful to build the children's nutrition policy and to plan the nutrition education program to improve the vitamin D status in children.
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