Prevalence and predictors of vitamin D insufficiency in adult population of yazd – The sun province in center of Iran

Abstract Background Vitamin D insufficiency (VDI) is one of impaired calcium absorption causes. It is associated with increased risk of several diseases. The aim of this study was to survey the prevalence and predictors of VDI in Yazd. Method and material This cross sectional study was conducted on 700 participant aged between 20 and 70 years old on second phase of the Iranian Multi-Center Osteoporosis Study (IMOS) in Yazd province. All analyzes were performed with the SPSS 20 and Stata 14.1 software. Chi-squared test, Pearson correlation and binary logistic regression were used. A significance level was considered for all tests P ≤ 0.05. Results The prevalence of VDI was 55.1% (51.37–58.87%) in total participant of this study. Predictors of VDI including: age 31–45 years old (OR = 1.68, CI = 1.04–2.70), female (OR = 3.49, CI = 1.80–6.78), live in the apartment houses (OR = 2.15, CI = 1.06–4.35), inability of climbing of steps (OR = 2.59, CI = 1.17–5.69), serum Calcium (OR = 0.53, CI = 0.34–0.81) and serum PTH (OR = 1.04, CI = 1.02–1.06). Conclusions The prevalence of VDI in Yazd is high. It is recommended to people that to be exposed to sunlight per day. And people should consumption vitamin D supplements under their physician.