title: "Vitamin D supplementation and bone health in adults with diabetic nephropathy: the protocol for a randomized controlled trial".
abstract: BACKGROUND
  Suboptimal vitamin D status is highly prevalent in Northern communities, particularly in those patients with chronic diseases such as diabetes and chronic renal disease. Emerging literature suggests that adherence to daily vitamin D supplementation may be an important factor influencing vitamin D status and overall bone health, but compliance with therapies for bone health is a major challenge. It is unknown what level of vitamin D supplementation will ameliorate or improve suboptimal vitamin D status in patients with diabetic nephropathy or contribute to improved bone health, particularly for those living in northern climates.
  
  
  METHODS
  The study purpose was to examine two different strategies of vitamin D3 supplementation; daily dosing of 2000 IU per day verses monthly dosing of 40,000 IU per month on markers of vitamin D status, bone health and to examine whether adherence, quality of life and patient satisfaction with the supplementation strategy differs between the two vitamin D strategies in adults diagnosed with diabetic nephropathy.
  
  
  CONCLUSIONS
  The need for RCTs assessing higher doses of vitamin D3 supplementation at varying frequencies of administration and its impact on bone health in adults with diabetes and chronic kidney disease are needed.
  
  
  BACKGROUND
  ClinicalTrials.gov NCT01476501.
authors.affiliation: Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada. mager@ualberta.ca.
authors.forename: Diana R
authors.initials: DR
authors.lastname: Mager
authors.forename: Stephanie T
authors.initials: ST
authors.lastname: Jackson
authors.forename: Michelle R
authors.initials: MR
authors.lastname: Hoffmann
authors.forename: Kailash
authors.initials: K
authors.lastname: Jindal
authors.forename: Peter A
authors.initials: PA
authors.lastname: Senior
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D050071:Bone Density Conservation Agents / Q000627:therapeutic use; D001842:Bone and Bones / Q000187:drug effects*; D002985:Clinical Protocols; D003924:Diabetes Mellitus, Type 2 / Q000150:complications*; D003928:Diabetic Nephropathies / Q000178:diet therapy* / Q000209:etiology; D019587:Dietary Supplements; D005260:Female; D005500:Follow-Up Studies; D050723:Fractures, Bone / Q000517:prevention & control; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011788:Quality of Life; D014807:Vitamin D / Q000627:therapeutic use*; D014808:Vitamin D Deficiency / Q000178:diet therapy* / Q000209:etiology; D055815:Young Adult
chemical_list: D050071:Bone Density Conservation Agents; D014807:Vitamin D