Abstract

Background and Purpose: Regarding the high prevalence of vitamin D deficiency and obesity , there are evidences which show that there are inverse relations between serum 25-hydroxyvitamin D level and the Body mass index (BMI) of children; concerning the limited studies in this field and the paradoxical information, this study has been planned and performed with the aim of analyzing the relation between serum 25-hydroxyvitamin D level with the BMI of the children over two years old among patients referred to Javaheri Hospital during 2017. Materials and Methods: In this descriptive and cross-sectional study, 150 children over two years old have been examined by serum 25-hydroxyvitamin D level test, and the weight of each child has been measured and recorded. It will be considered either as the vitamin D deficiency when serum 25-hydroxyvitamin D level be less than 10 ng/ml and when its level is  10-30 ng/ml, like the Vitamin D insufficiency. Gathered data in SPSS software has been revised, and 25 inputs with recourse to the statistical tests like Kolmogorov-Smirnov, Shapiro-Wilk, chi-square, Mann-Whitney, and Kruskal –Wallis be evaluated in two quantitative and qualitative scales.Findings: Individuals understudy have been in the range of 2-11 years old with an average of 2.1±4.28. Seventy-eight of the individuals understudy were girls (52%). The BMI range of the examined children was 12.29 -26.73 kg/m2, with a mean of 15.4 ± 2.13 kg/m2. According to the findings of this study, it is revealed that from the aggregate of 150 children with the demographic characteristics as mentioned-above, 6.7 percentages are afflicted with vitamin D deficiency, and 54.7 percent are afflicted with insufficient vitamin D level. Assuming 5 percent error of the Vitamin D deficiency and insufficiency prevalence in children respectively, are calculated as CI95%=3.6.-10.8  and CI95%=50.8.-58.8 . Also, no significant relations between serum vitamin D level of children with the BMI, and between age and gender have been observed (P-Value>0.05). Discussion & Result: In our study, 61.4 percentages of children are afflicted with either deficiency or insufficiency of vitamin D. Concerning the undesirable Vitamin D status, it is recommended that further analysis be done for finding vitamin D deficiency causes and its prevention and treatment with vitamin supplements.