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Background/Aims: Knowledge about neuropsychiatric symptoms in young-onset Alzheimer's disease (YO-AD) is scarce, but essential to establish a prognosis and plan care for YO-AD patients. The aim of this study is to assess frequency parameters of neuropsychiatric symptoms in YO-AD over 2 years and investigate whether there are differences compared with late-onset Alzheimer's disease (LO-AD). Methods: 98 YO-AD and 123 LO-AD patients and caregivers from two prospective cohort studies were included and assessed every 6 months for 2 years, using the Neuropsychiatric Inventory to evaluate neuropsychiatric symptoms. Results: Over the course of 2 years, the incidence, prevalence and persistence of neuropsychiatric symptoms were in general lower in YO-AD than in LO-AD, specifically for delusions, agitation, depression, anxiety, apathy, irritability and aberrant motor behavior. Frequency of individual symptoms showed large variability in both groups. Within the group of YO-AD patients, apathy was the most prevalent symptom. Conclusion: Neuropsychiatric symptoms, notably apathy, should be paid appropriate attention to in the diagnosis and treatment of YO-AD patients. Further research is needed to gain insight into the mechanisms underlying the differences in neuropsychiatric symptoms between YO-AD and LO-AD. Copyright © 2012 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]

Abstract: Objective: To investigate the time from symptom onset to institutionalization in persons with young-onset dementia (YOD) and compare these findings with late-onset dementia (LOD), and to determine which factors predict institutionalization in persons with YOD compared with LOD. Design/Setting: Longitudinal study of community-dwelling patients with YOD and LOD and their caregivers. Participants: A total of 226 patients with YOD and 102 with LOD and their informal caregivers were recruited through memory clinics and health care facilities. Measurements: Cox proportional hazard models were used to relate covariates with time to institutionalization. The main outcome was time from symptom onset to institutionalization. Key predictors were cohort (YOD or LOD), neuropsychiatric symptoms, caregiver distress caused by neuropsychiatric symptoms, and caregivers’ sense of competence (Short Sense of Competence Questionnaire total score). Results: The time from symptom onset to institutionalization was nearly 9 years for patients with YOD compared with approximately 4 years for patients with LOD. In the YOD group, apathy significantly predicted time of institutionalization. Furthermore, the caregiver’s competence in caring for the person with dementia significantly predicted institutionalization in both groups. Conclusions: Patients with YOD are cared for at home for a longer period than patients with LOD. The results of this study underline the importance of a timely diagnosis for these patients and their families to facilitate the initiation of appropriate care and support. Support programs aimed at enhancing the caregivers’ sense of competence and ability to deal with neuropsychiatric symptoms, especially apathy, may postpone the institutionalization of the patient. [Copyright &y& Elsevier]