DementiaAlzheimer DiseaseSeverity of Illness IndexNeuropsychological TestsNeurofibrillary TanglesPlaque, AmyloidPsychiatric Status Rating ScalesCognition DisordersDementia, VascularCaregiversBrainDementia, Multi-InfarctLewy Body DiseaseAIDS Dementia ComplexAtrophyMild Cognitive ImpairmentCognitionNursing HomesRisk FactorsLongitudinal StudiesParkinson DiseaseMagnetic Resonance ImagingProspective StudiesLewy BodiesCohort StudiesDisease Progressiontau ProteinsGeriatric AssessmentMemory DisordersApolipoprotein E4Frontotemporal Lobar DegenerationPick Disease of the BrainInjury Severity ScoreAgingPsychomotor AgitationFollow-Up StudiesAge FactorsHomes for the AgedPrevalenceBehavioral SymptomsActivities of Daily LivingPredictive Value of TestsRetrospective StudiesAge of OnsetCase-Control StudiesCholinesterase InhibitorsCross-Sectional StudiesReproducibility of Results