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Abbreviations: BIZA-D Berlin Inventory of caregivers’ burden with dementia patients, BSFC-s Burden Scale for Family Caregivers short, CATI computer assisted telephone interview, CG informal caregiver, CRF case report form, DCC day-care centre, EQ-5D-5L EuroQol five dimensions questionnaire, ETAM Erlangen test of activities of daily living in persons with mild dementia or mild cognitive impairment, FIMA Questionnaire for the use of medical and non-medical services in old age, IG intervention group, MMSE Mini-Mental State Examination, MoCA Montreal Cognitive Assessment, NOSGER Nurses’ Observation Scale for Geriatric Patients, NPI-Q Neuropsychiatric Inventory-Questionnaire, PCI person with cognitive impairment, RUD Resource Utilization in Dementia, WHO-5 Well-Being Index