Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT01942694 · ClinicalTrials.gov registry record · NA
Vitamin D and Type 2 Diabetes Study
A NA study of Type 2 Diabetes and PreDiabetes, sponsored by Tufts Medical Center.
- Completed
- Registry status
- NA
- Development phase
- 2,423
- Enrollment target
- 20
- Study locations
NCT01942694: Completed NA study of Type 2 Diabetes and PreDiabetes, sponsored by Tufts Medical Center.
NCT01942694 is a NA study of Type 2 Diabetes and PreDiabetes that has completed, run by Tufts Medical Center. The registered enrollment target is 2,423 participants, below the 3,916-participant average among 327 other Type 2 Diabetes trials with a reported enrollment target (38% lower). The trial reports 20 study locations across 16 states. According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT01942694, a NA study of Type 2 Diabetes and PreDiabetes, has completed, sponsored by Tufts Medical Center.
- COMPLETED
- Registry status
- NA
- Development phase
- 2,423 participants
- Enrollment target
- 20
- Study locations
Study Summary
The goal of the Vitamin D and type 2 diabetes (D2d) study is to determine if vitamin D supplementation works to delay the onset of type 2 diabetes in people at risk for the disease and to gain a better understand how vitamin D affects glucose (sugar) metabolism.
Primary Outcome
New-onset diabetes was based on annual glycemic testing of fasting plasma glucose, glycated hemoglobin, and 2-hour post-load plasma glucose and semiannual testing of fasting plasma glucose and glycated hemoglobin. If two or three of the glycemic measures met the 2010 ADA thresholds for diabetes, the participant was considered to have met the diabetes outcome. When only the measure for fasting plasma glucose or glycated hemoglobin met the threshold, confirmatory testing was performed for the posi
Conditions Studied
Interventions
- OTHER Placebo
- DIETARY_SUPPLEMENT Vitamin D (Cholecalciferol)
Study Locations (20)
California
- University of Southern California - Los Angeles
- Stanford University - Palo Alto
Florida
- Orlando VA Medical Center - Orlando
- Florida Hospital Translational Research Institute - Orlando
Louisiana
- Pennington Biomedical Research Center - Baton Rouge
- Tulane University Health Sciences - New Orleans
Nebraska
- Omaha VA Medical Center - Omaha
- University of Nebraska Medical Center - Omaha
Arizona
- Southwest American Indian Center - Phoenix
Colorado
- University of Colorado, Denver - Aurora
Georgia
- Atlanta VA Medical Center - Decatur
Illinois
- Northwestern University - Chicago
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 2,423 participants |
| Start Date | 2013-10 |
| Est. Completion | 2018-11 |
| Phase | NA |
What the finished NCT01942694 record still lists
NCT01942694 is an interventional study that assigns participants to a tested intervention. Its 2,423 participants enrollment target places it among the larger protocols in the corpus, below the 3,916-participant average among 327 other Type 2 Diabetes trials with a reported enrollment target (38% lower).
The record links to 2 conditions, with Type 2 Diabetes appearing as the primary indexed condition, and to 2 interventions - of which Placebo is the first listed.
NCT01942694 names 20 study sites across 16 states, led by California, Florida, Louisiana.
Frequently Asked Questions
What is clinical trial NCT01942694 about?
NCT01942694 is a clinical study titled "Vitamin D and Type 2 Diabetes Study". The goal of the Vitamin D and type 2 diabetes (D2d) study is to determine if vitamin D supplementation works to delay the onset of type 2 diabetes in people at risk for the disease and to gain a better understand how vitamin D affects glucose (sugar) metabolism.
What is the current status of trial NCT01942694?
This trial is currently completed. It is a NA study. The enrollment target is 2,423 participants. The study started on 2013-10. Estimated completion is 2018-11.
What conditions does trial NCT01942694 study?
This clinical trial studies the following conditions: Type 2 Diabetes, PreDiabetes.
What interventions are being tested in trial NCT01942694?
The interventions under investigation include: Placebo (OTHER), Vitamin D (Cholecalciferol) (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT01942694?
This trial is sponsored by Tufts Medical Center, which has 169 total clinical trials registered on ClinicalTrials.gov.
Where is trial NCT01942694 being conducted?
This trial has 20 study locations across Arizona, California, Colorado, Florida, Georgia. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
Learn More About Clinical Trials
Similar trials for Type 2 Diabetes
Matched on the same primary condition, ranked to surface studies in the same phase first, then by recruiting status, no relevance scoring or editorial curation.
Where NCT01942694's enrollment target sits among peer trials
2,423 14th of 327 higher than 314 of 327 other Type 2 Diabetes trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Type 2 Diabetes trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
-
Enhancing Telemedicine for T2D
RECRUITING · NA
-
Sleep and Glycemic Control in Type 2 Diabetes Adolescents
RECRUITING · NA
-
Enhancing Preventative Health Behaviors Among Emergency Department Hyperglycemic Patients
RECRUITING · NA
-
Ultrasound Effects on Glycemic Control in T2DM
RECRUITING · NA
-
A Randomized Double-Blinded and Placebo-Controlled Trial to Assess the Efficacy of Biophoton Therapy to Treat Type 2 Diabetes
RECRUITING · NA
-
High Fructose Diet, the Gut Microbiome, and Metabolic Health
RECRUITING · NA
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT05345951 · 2,425 participants · NA
Project e-PBI+ - Parent Intervention to Reduce College Student Drinking and Cannabis Use
- NCT05873387 · 2,420 participants
Development of an Algorithm to Detect Pulmonary Hypertension Using an Electronic Stethoscope
- NCT06676904 · 2,433 participants · NA
Neonatal Platelet Transfusion Threshold Trial
- NCT06128304 · 2,436 participants · NA
ACCESS: Accelerating Cervical Cancer Elimination Through the Integration of Screen-and-treat Services
Similar registry start date
- NCT05988463 · started 2027-01-01 · Phase 1
Dose-Escalation Study of Artesunate Patients With IPF
- NCT07219706 · started 2026-12-10 · NA
Dietary Fiber and Time Restricted Eating
- NCT02831335 · started 2026-12-01
Technical Development of Multi-Parametric Renocerebral MRI
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia