Nutritional status of vitamin D among rural adult residents in Tongzhou District,Beijing
Objective To investigate the nutritional status of vitamin D and its affecting factors amongst rural adult residents in Tongzhou District,Beijing.Methods A stratified cluster sampling method was used to randomly select permanent residents from 6 administrative villages in 3 townships of Tongzhou District for conducting a questionnaire survey,physical examination and venous blood sample collection.The residents'serum 25-hydroxyvitamin D(25-(OH)D)concentration was determined by high performance liquid chromatography(HPLC)-tandem mass spectrometry,and their nutritional status of vitamin D was evaluated.Multivariate ordered logistic regression model was employed to explore the factors influencing vitamin D insufficiency or deficiency.Results A total of 534 residents completed the survey.The residents'serum 25-(OH)D showed a positively skewed distribution,with a median of 16.60(12.70,22.03)ng/ml.The prevalence rates of vitamin D insufficiency and deficiency were 48.50％(259/534)and 18.91％(101/534)respectively.Multivariate regression analysis displayed that rural female adult residents(OR=2.413,95％CI:1.725-3.380),residents aged 18-44 years(OR=1.842,95％CI:1.090-3.114),and adult residents with overweight(OR=1.605,95％CI:1.013-2.545)and obesity(OR=1.696,95％CI:1.017-2.824)were at higher risk of vitamin D insufficiency or deficiency.Conclusion The nutritional status of vitamin D among rural adult residents in Tongzhou District is not optimistic.Special attention should be paid to vitamin D insufficiency and deficiency in rural women and young,middle-aged,overweight and obese groups.
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