title: Effects of Vitamin D Intake on FEV1 and COPD Exacerbation: A Randomized Clinical Trial Study.
abstract: OBJECTIVE
  This study aimed to evaluate the effects of vitamin D intake on COPD exacerbation and FEV1 in the patients with severe and very severe COPD.
  
  
  METHODS
  This double blind placebo control randomized clinical trial study was done in the Ashayer university hospital in Khorramabad in 2012. Eighty eight patients with severe and very severe COPD were randomly selected from those who recoursed to the internal medicine clinic of Ashayer hospital. They were randomly allocated to case and placebo group. The patients received routine treatment for COPD. Along with the routine treatment, placebo group received 100,000 IU of oral vitamin D per month, for 6 months. Data was analyzed using SPSS computer software, paired t-test, independent t-test, non parametric t-test and Pearson correlation coefficients.
  
  
  RESULTS
  In each group, there were 44 patients. After the intervention, there were significant differences in FEV1 and the number of COPD exacerbation between the case and control group patients. Also, after the study, in the case group, FEV1 was increased and the number of COPD exacerbation was decreased significantly.
  
  
  CONCLUSIONS
  Vitamin D intake decreased COPD exacerbation and improved FEV1 in the patients with severe and very severe COPD. It is suggested that baseline serum vitamin D levels will recorded in similar studies and the effect of vitamin D intake will evaluated regarding the baseline serum vitamin D levels.
authors.affiliation: School of medicine, Lorestan University of Medical Sciences, Khorramabad, Iran.. gholami.mr@lums.ac.ir.
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Zendedel
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Gholami
authors.forename: Khatereh
authors.initials: K
authors.lastname: Anbari
authors.forename: Kourosh
authors.initials: K
authors.lastname: Ghanadi
authors.forename: Elham Ceneicel
authors.initials: EC
authors.lastname: Bachari
authors.forename: Alireza
authors.initials: A
authors.lastname: Azargon
mesh_terms: D000328:Adult; D004311:Double-Blind Method; D005260:Female; D005541:Forced Expiratory Volume / Q000187:drug effects; D006801:Humans; D007492:Iran; D008297:Male; D008875:Middle Aged; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy* / Q000503:physiopathology*; D014807:Vitamin D / Q000627:therapeutic use*; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins; D014807:Vitamin D