Prospective Study on Diabetes Mellitus and Its Complications in Newly Diagnosed Adult Patients (GDC)
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ClinicalTrials.gov Identifier: NCT01055093 |
Recruitment Status :
Recruiting
First Posted : January 25, 2010
Last Update Posted : April 19, 2023
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Condition or disease |
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Diabetes Mellitus, Type 1 Diabetes Mellitus, Type 2 |
In detail, the following questions will be answered:
- Are there different phenotypes with respect to insulin secretion, insulin sensitivity, micro- and macrovascular status and diabetic neuropathy at time of diagnosis?
- Which factors modify the progression of the disease (Nutrition, subclinical inflammation, energy metabolism and physical activity)?
- Can we identify subgroups at baseline with different progression of the disease? Patients are thoroughly examined at baseline and after 2, 5, and 10 years with annual telephone contacts in between.
Study Type : | Observational |
Estimated Enrollment : | 2000 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Official Title: | Prospective Study on Diabetes Mellitus and Its Complications in Newly Diagnosed Adult Patients |
Actual Study Start Date : | September 2005 |
Estimated Primary Completion Date : | September 2025 |
Estimated Study Completion Date : | September 2035 |

Group/Cohort |
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Diabetes Cohort
Prospectively followed cohort of newly diagnosed patients with diabetes mellitus, aged 18-69 years at inclusion into the study
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Control Cohort
Prospectively followed cohort of glucose tolerant humans, aged 18-69 years at inclusion into the study
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- Change of insulin sensitivity (M-Value) [ Time Frame: 2 and 5 years ]measurement of whole body insulin sensitivity with hyperinsulinamic euglicamic clamp
- Change of insulin secretion [ Time Frame: 2 and 5 years ]measurement of insulin secretion with glucagon test, mixed-meal test and intravenous glucose tolerance test
- Incidence of any diabetic complication [ Time Frame: 2-10 years ]The prevalence of diabetic complications
Biospecimen Retention: Samples With DNA

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Ages Eligible for Study: | 18 Years to 69 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- Clinical diagnosis of diabetes mellitus according to ADA criteria
- Age 18-69
- Diabetes duration since diagnosis < 12 months
- Control cohort: proven normal glucose tolerance according to ADA criteria
Exclusion Criteria:
- Diabetes mellitus category 3 B-H (ADA criteria)
- Pregnancy
- Severe renal, liver or heart disease
- malignant cancer
- severe psychiatric illness or addiction
- participation in an intervention trial

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): NCT01055093
Contact: Julia Szendrödi, MD | +49-211-3382-0 ext -209 | studienzentrum@ddz.de | |
Contact: Petra Heidkamp | +49-211-3382-0 ext -209 | studienzentrum@ddz.de |
Germany | |
German Diabetes Center | Recruiting |
Düsseldorf, North-Rhine Westphalia, Germany, 40225 | |
Contact: Clinical Study Center +49-211-3382-0 ext -209 studienzentrum@ddz.de | |
Principal Investigator: Michael Roden, Prof., MD | |
Sub-Investigator: Dan Ziegler, Prof., MD | |
Sub-Investigator: Christian Herder, PhD, M.Sci. | |
Sub-Investigator: Wolfgang Rathmann, MD, MSPH | |
Sub-Investigator: Andrea Icks, MD | |
Sub-Investigator: Joachim Rosenbauer, Ph.D. | |
Sub-Investigator: Jörg Kotzka, Ph.D. |
Principal Investigator: | Michael Roden, Prof., MD | German Diabetes Center |
Publications of Results:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: | julia szendrödi, Dr. Julia Szendrödi, German Diabetes Center |
ClinicalTrials.gov Identifier: | NCT01055093 |
Other Study ID Numbers: |
GDC-Study-01 |
First Posted: | January 25, 2010 Key Record Dates |
Last Update Posted: | April 19, 2023 |
Last Verified: | April 2023 |
diabetes mellitus prospective observational study diabetic complications |
Diabetes Mellitus Diabetes Mellitus, Type 2 Diabetes Mellitus, Type 1 Glucose Metabolism Disorders |
Metabolic Diseases Endocrine System Diseases Autoimmune Diseases Immune System Diseases |