Effect of Vitamin D Supplementation on Blood Pressure and HbA1c Levels in Patients With T2D

April 24, 2012 updated by: Reto Krapf, Kantonsspital Baselland Bruderholz

Effect of Administration of 25(OH) Vitamin on Mean 24 Hour Blood Pressure and HBA1c Levels in Patients With Stable Type 2 Diabetes Mellitus

The effect of administration of vitamin D is tested on the long-term control of blood sugar (as measured by HbA1-c levels in blood) and mean blood pressure (as measured by 24 hour blood pressure profiles)in patients with stable type 2 diabetes mellitus

Study Overview

Status

Completed

Study Type

Interventional

Enrollment (Actual)

51

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Basel-Landschaft
      • Bruderholz/Basel, Basel-Landschaft, Switzerland, CH-4101
        • Department of medicine, Kantonsspital Bruderholz

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion criteria

  • Men and women, ages ≥18 years
  • Official diagnostic criteria for type 2 diabetes fulfilled in patients on any type of oral or parenteral glucose-lowering treatment
  • Independent living at home
  • On stable regimen of BP meds (if any) with BP well controlled and/or K supplement (if any) for 2 months and which is deemed unlikely to change during the study
  • Stable glucose control for 2 months by any approved method including insulin

Exclusion criteria

  • Patients with type 1 diabetes (or insulin-requiring diabetes of unclear type)
  • Patients on hemodialysis, with hyperparathyroidism or active cancer disease
  • Patients with known metabolic bone disease
  • Laboratory evidence of kidney (eGFR < 60 ml/min) or liver disease
  • Dietary calcium intake exceeding 1500mg/d (as estimated by dietary history)
  • 25(OH) vitamin D levels at baseline > 70 nmol/L
  • Calciuria (> 8 mmol/24 hours as measured by 24 hour urine collections)
  • Hypo- and hypercalcemias and hypo- and hyperphosphatemias of any cause
  • Medications that affect vitamin D metabolism (e.g. antiepileptic drugs, calcimimetics, 1-34 PTH (Forsteo) vitamin D therapy over and above 400U daily 6 months prior to enrollment and during the study)
  • Foreseeable need for adaptation of either glucose- or blood pressure lowering during the next 6 months as decided by the family physician or the treating diabetologist - see above
  • History of binge eating or wt gain or loss exceeding 6 kg in past 18 months
  • Patients on any type of inhibitors of plasma coagulation (i.e. coumarine, heparins)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: vitamin D
Intervention: Intramuscular injection of 300 000 U of 25(OH)vitamin D
300 000 U intramuscularly, one dosage, in subjects with 25 (OH) vit D levels below 80 nmol/L, another dosage of 150 000 U after 3 months if 25(OH)vit D levels continue to be below 80 nmol/L.
Placebo Comparator: placebo
administration of 0.9 % NaCl as a placebo
1 ml of 0.9 % of NaCl at the beginning and 0.5 ml of 0.9 % NaCl after three months

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Change in HBA1-c levels
Time Frame: 3 and 6 months
3 and 6 months
24 hour mean blood pressure
Time Frame: 3 and 6 months
3 and 6 months

Secondary Outcome Measures

Outcome Measure
Time Frame
plasma glucose
Time Frame: 3 and 6 months
3 and 6 months
HOMA
Time Frame: 6 months
6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Reto Krapf, MD, Department of Medicine, Kantonsspital Bruderholz, University of Basel, Switzerland

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2009

Primary Completion (Actual)

June 1, 2010

Study Completion (Actual)

June 1, 2010

Study Registration Dates

First Submitted

April 23, 2012

First Submitted That Met QC Criteria

April 24, 2012

First Posted (Estimate)

April 25, 2012

Study Record Updates

Last Update Posted (Estimate)

April 25, 2012

Last Update Submitted That Met QC Criteria

April 24, 2012

Last Verified

April 1, 2012

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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