A cohort description and comparison of four European national diabetes registries for the REDDIE project
Authors' conclusion
The four registries that make up the REDDIE project contain many commonly collected variables. However, each registry presents specific strengths and limitations. By including all four databases, the REDDIE project benefits from the complementary strengths of each database.
Study context
- Population
- Four European national diabetes registries contributing to the REDDIE project; data from inception until 20244 registries
- Exposure
- NDA vs DPV vs NDR vs Danish National Registries (DNR)
- Outcome
- Registry content
Methodological detailsmultinational, four national registries
- Multinational
- Four national registries
Main finding
As reported in the abstract
- Core set of variables identified across all four registries
- Demographics, diabetes-related medication, glycaemic control measures and lifestyle factors measured in all four registries
- DNR, NDA and NDR also contain wider prescription data, diagnosis data (CVD, retinopathy) and mortality data
- DPV lacks these data but contains detailed CGM and insulin pump usage data
- Differences in data collection techniques, linkage processes, follow-up protocols and range of variables recorded
Observational data: associations, not effects.
Original publication
A cohort description and comparison of four European national diabetes registries for the REDDIE project. Diabet Med. Published 1 October 2025. doi:10.
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