U.S. government shutdown delays the start of recruitment

The U.S. federal government enters a shutdown because neither legislation appropriating funds for fiscal year 2014 nor a continuing resolution for the interim authorization of appropriations are enacted before the new fiscal year begins. Participant recruitment in D2d is...

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D2d becomes the first NIDDK supported trial to use IRBShare

Obtaining IRB approval from each separate collaborating clinical site has long been considered a major reason for delaying the start of activities in multi-center trials. D2d becomes the first NIDDK-supported trial and only the fifth NIH-supported study to join...

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Investigators’ Kick-off meeting

The first meeting of the D2d Research Group is held in Bethesda, MD. Investigators and coordinators from all sites and all supporting units (e.g., central laboratory, central pharmacy) plan a successful study launch.

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U01 grant to conduct D2d is formally awarded

Tufts Medical Center receives the U01 cooperative agreement grant to fund and conduct D2d. The grant is awarded by NIDDK and the NIH Office of Dietary Supplements. Project Manager Patty Sheehan and Principal Investigator Anastassios Pittas (shown in the...

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The D2d DSMB inaugural meeting takes place

The inaugural meeting of the D2d Data Safety Monitoring Board (DSMB) takes place in Bethesda, MD. The core D2d team – composed of Dr. Pittas (principal investigator), Dr. Staten (NIH project scientist), Dr. Ware (lead statistician) and Ms. Sheehan...

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U01 cooperative agreement grant application undergoes scientific review

The U01 grant application seeking funding for D2d undergoes a highly favorable scientific peer review by a NIH Special Emphasis Study Section, specifically convened to review the application. The review panel considers the application “outstanding” and gives a priority...

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U01 cooperative agreement grant is submitted

The D2d team submits a U01 grant application to NIH for funding to conduct D2d. Assembling a 1,140-page grant application was a Herculean effort by the D2d planning team. Many scientific, logistical, financial and administrative components came together to...

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Progress of U34 planning phase is reviewed favorably

An External Evaluation Committee convened by NIDDK reviews the progress of the U34 planning phase. The Committee concludes that the D2d team has made excellent progress in designing the D2d study and in preparing for the clinical trial phase....

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Association between higher blood level of vitamin D and lower risk of diabetes among adults with prediabetes is reported

This observational study was to assess the longitudinal association between vitamin D status – assessed by blood level of 25-hydroxyvitamin D – and risk of developing diabetes among people at high risk for diabetes (i.e., with prediabetes). The case-cohort study followed participants...

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The Origin of the D2d logo

The D2d logo was created in the summer of 2011. The three elements (D, 2, d) were chosen to represent the D2d study in the most laconic and memorable way possible. The first “D” stands for vitamin D. The...

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