German Dementia Registry

Inclusion Criteria: Inclusion Criteria for Patient: * Ability of the participant and/or his/her legally authorized representative (e.g., spouse or legal guardian), as appropriate and applicable, to understand the purpose and risks of the register and provide signed and dated informed consent and authorization to use protected health information (PHI) in accordance with national and local privacy regulations. * Participating patients must have a diagnosis of SCD, MCI or early dementia of different etiology (i.e. Alzheimer's Disease, Frontotemporal Dementia, Parkinson's Disease, Lewy-Body Dementia, Progressive Supranuclear Palsy, Corticobasal Degeneration, Normal Pressure Hydrocephalus, Major Depression; Vascular Dementia; TDP-43 associated limbic encephalopathy (LATE), Mixed Dementia AD + VaD, Prion-Associated Dementia) together with biomarkers such as cerebrospinal fluids (CSF) amyloid beta 1-42, amyloid beta 1-40, amyloid beta 1-42/amyloid beta 1-40 ratio, total tau and phosphorylated tau, amyloid or tau imaging. * At least 18 years of age. Inclusion Criteria for family member: * At least 18 years of age. * Patient was included in the registry * Family member is strongly involved to the patient's life according to the patient's statement * Ability of the participant, as appropriate and applicable, to understand the purpose and risks of the register Exclusion Criteria: Exclusion Criteria for Patient: * Unwilling to provide informed consent. * No available biomarkers such as cerebrospinal fluids (CSF) amyloid beta 1-42, amyloid beta 1-40, amyloid beta 1-42/amyloid beta 1-40 ratio, total tau and phosphorylated tau, amyloid or tau imaging. Exclusion Criteria for family member: * Unable or unwilling to provide informed consent.