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Vitamin D Inadequacy is Associated With Incidence of Type 2 Diabetes

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ClinicalTrials.gov Identifier: NCT01508481
Recruitment Status : Completed
First Posted : January 12, 2012
Last Update Posted : October 10, 2012
Sponsor:
Information provided by (Responsible Party):
Soo Lim, Seoul National University Bundang Hospital

Brief Summary:
Emerging evidence suggests that vitamin D [25-hydroxyvitamin D; 25(OH)D] may play a role in the etiology of type 2 diabetes. Vitamin D levels are lower in those with type 2 diabetes and impaired glucose tolerance (IGT) compared with those with normal glucose tolerance (NGT). In addition, a few prospective studies have shown a significant inverse association of baseline serum 25(OH)D with incident diabetes. To date, however, the exact mechanisms through which vitamin D affects diabetes risk are not yet fully known, particularly whether vitamin D plays a role in insulin resistance (IR) and/or b-cell dysfunction, the main pathophysiological disorders underlying type 2 diabetes. So, the investigators plan to examine the prospective associations of baseline vitamin D [25-hydroxyvitamin D; 25(OH)D] with insulin resistance (IR), b-cell function, and glucose homeostasis in subjects at risk for type 2 diabetes.

Condition or disease
Type 2 Diabetes

Study Type : Observational
Actual Enrollment : 1500 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Vitamin D Inadequacy is Associated With Incidence of Type 2 Diabetes
Study Start Date : January 2007
Actual Primary Completion Date : October 2012
Actual Study Completion Date : October 2012

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Vitamin D
Drug Information available for: Vitamin D

Group/Cohort
Diabetes high risk group



Primary Outcome Measures :
  1. Incidence of diabetes [ Time Frame: 5 years ]
    Incidence of diabetes defined by American Diabetes Association criteria


Secondary Outcome Measures :
  1. Pancreatic beta cell function [ Time Frame: 5 years ]
    Pancreatic beta cell function assessed by homeostasis model

  2. Insulin resistance [ Time Frame: 5 years ]
    Insulin resistance assessed by homeostasis model


Biospecimen Retention:   None Retained
Blood sample was collected at the baseline.


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Ages Eligible for Study:   30 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Study participants, aged over 30 years, are recruited from Korea, between January 2006 and December 2011. Participants are at high risk for type 2 diabetes, as they are recruited on the basis of the presence of one or more risk factors for diabetes, including obesity, hypertension, dislipidemia, and a family history of diabetes. Participants are contacted every 6 month after the baseline visit to update contact information and collect data on major health events. Participants are invited to return to the clinic examination centers after 3 years for follow-up assessments.
Criteria

Inclusion Criteria:

  • one or more risk factors for diabetes, including:

    • obesity
    • hypertension
    • dislipidemia
    • a family history of diabetes

Exclusion Criteria:

  • previous diagnosed diabetes
  • vitamin D supplement.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01508481


Locations
Korea, Republic of
Seoul National University Bundang Hospital
Seongnam, Korea, Republic of, 463-707
Sponsors and Collaborators
Seoul National University Bundang Hospital
Investigators
Principal Investigator: Soo Lim, MD, PHD Seoul National University Bundang Hospital

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Soo Lim, Principal Investigator, Seoul National University Bundang Hospital
ClinicalTrials.gov Identifier: NCT01508481     History of Changes
Other Study ID Numbers: VitaminD_T2DM
First Posted: January 12, 2012    Key Record Dates
Last Update Posted: October 10, 2012
Last Verified: October 2012

Keywords provided by Soo Lim, Seoul National University Bundang Hospital:
Vitamin D
Diabetes
pancreas beta cell function
insulin resistance
Deficiency of Vitamin D3

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes Mellitus, Type 2
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Vitamins
Vitamin D
Ergocalciferols
Micronutrients
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents