DDI (Dementia Disease Initiation) is a national research network focusing on clinical and translational research in incipient dementia-giving diseases. Patients are recruited and followed at all university hospitals, and included in ongoing research projects and clinical trials. DDI has a common infrastructure, including customized searchable database (clinical and cognitive data, multimodal imaging, genetics, proteomics) located at TSD/UiO. DDI also connects to international studies like PMI-AD (Precision Medicine in AD). The Norwegian Neuroinformatics Node adds resources to further developing the DDI database.