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Prevalence and Trends of Vitamin D Deficiency Among Iranian Adults: A Longitudinal Study From 2001–2013 Publisher Pubmed



Khosraviboroujeni H1, 2 ; Sarrafzadegan N3 ; Sadeghi M4 ; Roohafza H4 ; Ng SK1, 2 ; Pourmogaddas A3 ; Ahmed F1, 2
Authors

Source: Journal of Nutritional Science and Vitaminology Published:2017


Abstract

Vitamin D deficiency/insufficiency is currently considered to be a re-emerging public health problem globally. This study was designed to determine the prevalence of vitamin D deficiency and insufficiency and to investigate its trend from 2001 to 2013 in a longitudinal study of Iranian adults. This study was part of a population-based, longitudinal ongoing study of Iranian healthy adults aged 35 y and older at baseline. Serum vitamin D level was assessed in a sub-sample of 370 subjects, who were apparently healthy at the time of recruitment in 2001 and were free from MetS, in three phases (2001, 2007 and 2013) during the 12-y study period. Adjusted prevalence and trend of vitamin D deficiency were calculated. Mean serum vitamin D levels increased over the time of the study (52.12, 54.27 and 62.28 nmol/L, respectively) and the prevalence of vitamin D deficiency decreased (30.5, 27.0 and 24.4, respectively). However, the prevalence of vitamin D insufficiency did not change over this time period. The risk of vitamin D deficiency decreased significantly in 2007 [OR: 0.73 (95% CI: 0.53, 0.99)] and 2013 [OR: 0.50 (95% CI: 0.36, 0.70)] compared to the baseline. The present study demonstrated some improvement in serum vitamin D levels, while the prevalence of vitamin D inadequacy was still high. Considering the possible health consequences of vitamin D deficiency, there is an urgent need for developing population-wide strategies, such as supplementation and fortification, to prevent or control vitamin D deficiency. © 2017, Center for Academic Publications Japan. All rights reserved.
1. The Prevalence of Vitamin D Deficiency in Iran: A Literature Review, Current Nutrition and Food Science (2020)
2. Mean Serum Levels of Vitamin D in Elderly Women, Isfahan, Iran, Journal of Isfahan Medical School (2012)
3. Is the Association Between Vitamin D and Metabolic Syndrome Independent of Other Micronutrients?, International Journal for Vitamin and Nutrition Research (2015)
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