178-LB: Prevalence of Vitamin D Deficiency among Patients with Type 2 Diabetes in Qingdao, China

The aim of the current study is to investigate the prevalence of vitamin D deficiency among patients with type 2 diabetes (T2DM) in a Chinese cohort. We enrolled 3025 patients with T2DM (aged 30-91 yrs) who were hospitalized in Qingdao Endocrine and Diabetes Hospital from Jan 2018 to Jan 2019. The exclusion criteria were as follows: (1) with other types of diabetes; (2) pregnant or lactating females; (3) with acute complications of diabetes or other stress states, such as surgery and trauma; (4) with rheumatologic, serious hepatic, cardiac, renal failure, malignancy, and endocrine diseases that affect the metabolism of vitamin D. Serum level of 25-OH-vitamin D ≥ 30 ng/mL was defined as normal, 20 ng/mL ≤ 25-OH-vitamin D < 30 ng/mL as vitamin D insufficiency (VDI) , and serum 25-OH-vitamin D < 20 ng/mL as vitamin D deficiency (VDD) . The chi-square test was used for group comparison of VDD or VDI prevalence. In all subjects, the prevalence of VDI was 35%. Male patients had higher prevalence of VDI than female patients (40.0% vs. 28.9%, P