An observational study in Diabetes Mellitus, Type 1 and Diabetes Mellitus, Type 2, sponsored by German Diabetes Center. Recruiting at 1 site in Germany. Open to participants aged 18 Years to 69 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-07-16.
Sponsored by German Diabetes Center · Observational
The aim of the prospective observational GDC-Study in patients with newly diagnosed diabetes mellitus aged 18-69 years at inclusion into the study is to characterize in detail the clinical, metabolical and immunological phenotype and monitor the progression of the disease and to compare the phenotype to glucose tolerant humans of similar age, body mass and sex distribution.
In detail, the following questions will be answered:
3,754 studies on the registry are indexed under Diabetes Mellitus, Type 1; 600 are open to participants now.
This study's planned enrollment of 2,000 is above the median of 125 across 792 observational studies indexed under Diabetes Mellitus, Type 1.
Browse Diabetes Mellitus, Type 1 studies →German Diabetes Center is the lead sponsor of 30 studies on the registry; 8 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Patients are recruited from the general populations by screening
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Prospectively followed cohort of newly diagnosed patients with diabetes mellitus, aged 18-69 years at inclusion into the study
Prospectively followed cohort of glucose tolerant humans, aged 18-69 years at inclusion into the study
Change of insulin sensitivity (M-Value)
measurement of whole body insulin sensitivity with hyperinsulinamic euglicamic clamp
Time frame: 2 and 5 years
Change of insulin secretion
measurement of insulin secretion with glucagon test, mixed-meal test and intravenous glucose tolerance test
Time frame: 2 and 5 years
Incidence of any diabetic complication
The prevalence of diabetic complications
Time frame: 2-10 years
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
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German Diabetes Center