title: Relationship between fasting serum glucose, age, body mass index and serum 25 hydroxyvitamin D in postmenopausal women.
abstract: OBJECTIVE
  Because it has been reported that vitamin D, given to mother or infant, can prevent type I diabetes in children, that diabetes is more common in adults with low serum vitamin D and that insulin secretion and action are related to vitamin D levels in healthy young adults we examined the relationship between serum vitamin D metabolites and fasting serum glucose in patients attending our outpatient clinics.
  
  
  METHODS
  Retrospective examination of convenience sample of postmenopausal women attending our osteoporosis clinics.
  
  
  METHODS
  A total of 753 postmenopausal women attending a university hospital outpatient clinic and not on any treatment known to affect glucose metabolism.
  
  
  METHODS
  Body weight and height, serum 25-hydroxyvitamin D [25(OH)D], serum 1,25-dihydroxyvitamin D [1,25(OH)2D], serum PTH and fasting serum glucose.
  
  
  RESULTS
  On simple correlation fasting serum glucose was a positive function of age (P < 0.05), weight (P < 0.001) and body mass index (BMI) (P < 0.001) and a negative function of serum 25(OH)D (P < 0.001), but it was not significantly related to either serum 1,25(OH)2D, PTH or creatinine. When fasting serum glucose was regressed simultaneously on age, BMI and 25(OH)D, glucose was still an inverse function of 25(OH)D (P = 0.006).
  
  
  CONCLUSIONS
  Fasting serum glucose increased as 25(OH)D levels fell throughout the range of serum 25(OH)D measured but the greatest increase was observed in those with 25(OH)D below 40 nmol/l.
authors.affiliation: Division of Clinical Biochemistry, Institute of Medical and Veterinary Science, University of Adelaide, Adelaide, SA, Australia. allan.need@imvs.sa.gov.au
authors.forename: Allan G
authors.initials: AG
authors.lastname: Need
authors.forename: Peter D
authors.initials: PD
authors.lastname: O'Loughlin
authors.forename: Michael
authors.initials: M
authors.lastname: Horowitz
authors.forename: B E Christopher
authors.initials: BE
authors.lastname: Nordin
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001786:Blood Glucose / Q000032:analysis*; D015992:Body Mass Index; D002112:Calcifediol / Q000097:blood*; D003404:Creatinine / Q000097:blood; D003924:Diabetes Mellitus, Type 2 / Q000097:blood; D005215:Fasting; D005260:Female; D006801:Humans; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000097:blood; D017698:Postmenopause / Q000097:blood*; D012044:Regression Analysis; D012307:Risk Factors; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D044465:White People
chemical_list: D001786:Blood Glucose; D010281:Parathyroid Hormone; D014807:Vitamin D; C097949:1,25-dihydroxyvitamin D; D003404:Creatinine; D002112:Calcifediol