Background: Comprehensive studies on caregiver burden (CB) of persons caring for dementia patients differ methodologically and show variable results.<bold>Objective: </bold>Analysis of known and hypothesized factors of CB in home care of dementia patients. Methods: Multicenter longitudinal study comprising 585 persons caring mostly for Alzheimer's disease patients (age median 77.25 years, Mini-Mental State Examination raw score median 23) using the Zarit Caregiver Burden Interview (CBI).