title: The association between 25-dehydroxy vitamin D and lower respiratory infection in children aged less than "5" years in Imam Reza hospital, Bojnurd, Iran.
abstract: OBJECTIVE
  To clarify the association between vitamin D deficiency and acute respiratory infection in children below age 5 years.
  
  
  METHODS
  The cross-sectional study was conducted at Imam Reza Hospital in Bojnurd, Iran, in June 2013 and comprised 90 children below 5 years of age suffering from respiratory infections. They was selected on the basis of purposive sampling and were then categorised into two equal groups of 'acute' and 'non-acute' respiratory infection. Data collection was done using a questionnaire and serum level of 25-dehydroxycalcciferol was measured. SPSS 11 was used to analyse and interpret the data.
  
  
  RESULTS
  In the group of children with respiratory disorders, 9 (42.9%) exhibited vitamin D deficiency. There were no significant differences between the two groups in terms of demographic characteristics such as age, intrauterine age, weight, birth-weight, head circumference, height, gender, living area and respiratory distress (p>0.05 each). Vitamin D deficiency showed no meaningful statistical relation with acute respiratory infections (p>0.05).
  
  
  CONCLUSIONS
  More studies with higher sample size and are recommended.
authors.affiliation: Department of Pediantric, Faculty of Medicine, North Khorasan University of Medical Science, Bojnurd, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Khakshour
authors.affiliation: Neonatal Research Center, School Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Ahmad Shah
authors.initials: AS
authors.lastname: Farhat
authors.affiliation: Neonatal Research Center, School Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Ashraf
authors.initials: A
authors.lastname: Mohammadzadeh
authors.affiliation: M.Sc of Nursing, Faculty Member, North Khorasan University of Medical Sciences, Bojnurd, Iran, Candidate in Nursing, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Fatemeh Khorashadi
authors.initials: FK
authors.lastname: Zadeh
authors.affiliation: Research Center of Natural Products Safety, North Khorasan University of Medical Science, Bojnurd, Iran.
authors.forename: Hosein
authors.initials: H
authors.lastname: Kamali
mesh_terms: D000367:Age Factors; D002675:Child, Preschool; D002762:Cholecalciferol / Q000031:analogs & derivatives* / Q000097:blood; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007223:Infant; D007492:Iran; D008297:Male; D012141:Respiratory Tract Infections / Q000097:blood* / Q000150:complications*; D014808:Vitamin D Deficiency / Q000150:complications* / Q000175:diagnosis
chemical_list: D002762:Cholecalciferol; C021656:25-dehydrocholecalciferol
keywords: 25-dehydroxy vitamins D, Lower respiratory infection, Children below age 5 years.