2,423
Participants
Start Date
October 31, 2013
Primary Completion Date
November 30, 2018
Study Completion Date
November 30, 2018
Vitamin D (Cholecalciferol)
Vitamin D (Cholecalciferol) 4000 IU, administered as 1 soft-gel pill daily by mouth.
Placebo
Administered as one soft-gel pill daily by mouth
Beth Israel Medical Center, New York
MedStar Community Clinical Research Center, Hyattsville
Duke University, Durham
Medical University of South Carolina, Charleston
Atlanta VA Medical Center, Decatur
Orlando VA Medical Center, Orlando
Florida Hospital Translational Research Institute, Orlando
University of Tennessee Health Science Center, Memphis
Cleveland Clinic, Cleveland
Health Partners Riverside Clinic, Minneapolis
Northwestern University, Chicago
University of Kansas Medical Center, Kansas City
Omaha VA Medical Center, Omaha
University of Nebraska Medical Center, Omaha
Tulane University Health Sciences, New Orleans
Pennington Biomedical Research Center, Baton Rouge
University of Texas Southwestern Medical Center, Dallas
Baylor College of Medicine, Houston
University of Colorado, Denver, Aurora
Southwest American Indian Center, Phoenix
University of Southern California, Los Angeles
Stanford University, Palo Alto
Kaiser Permanente Center for Health Research, Portland
Maine Medical Center, Scarborough
Tufts Medical Center, Boston
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Office of Dietary Supplements (ODS)
NIH
American Diabetes Association
OTHER
Tufts Medical Center
OTHER