%0 Journal Article %T Investigating the Levels of Serum Vitamin D in Patients with Rheumatoid Arthritis Referred To Rasoul-Akram Hospital During 2011-2012 %J Iranian Journal of Medical Sciences %I Shiraz University of Medical Sciences %Z 0253-0716 %A Fakharan, Mahdi %A Haghighi, Anousheh %A Arabi, Mohsen %A Loghman, Maryam %D 2014 %\ 09/01/2014 %V 39 %N 5 %P 476-479 %! Investigating the Levels of Serum Vitamin D in Patients with Rheumatoid Arthritis Referred To Rasoul-Akram Hospital During 2011-2012 %K Vitamin D %K Rheumatoid Arthritis %K Iran %R %X Vitamin D3 has a role in many autoimmune diseases and appears to play a function in controlling Rheumatoid Arthritis (RA). The aim of this study is to evaluate the relationship between serum level of vitamin D and RA disease activity score. The serum level of vitamin D in 75 RA patients referred to the rheumatology clinic of Rasoul-Akram hospital was measured. Patients were classified into low, moderate and high RA activity groups based on the DAS-28 criteria (Disease Activity Score in 28 joints) and the mean values of serum vitamin D were compared between the three groups.The mean serum levels of vitamin D in high activity group (17.057±7.7 mg/ml) was significantly less than moderate (30.5±11.3 mg/ml) and low (36.7±19.5 mg/ml) activity groups (P<0.001). The outcome of this study shows that serum level of vitamin D is inversely correlated with the activity of RA. %U https://ijms.sums.ac.ir/article_39692_fc13ab236827e04f410ea4fabd4d8884.pdf