Age-related incidence and family history in Frontotemporal dementia: Data from the Swedish Dementia Registry

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Abstract

Objectives: Frontotemporal dementia (FTD) is considered to be a mainly early-onset neurodegenerative disorder with a strong hereditary component. The aim of the study was to investigate age-related incidence and family history in FTD compared to other dementia disorders, especially Alzheimer's disease (AD). Methods: The Swedish Dementia Registry (SveDem) registers all new cases of dementia diagnosed by the participating centres, including data on demographics, diagnosis, and investigations used. Data for the period 2008-2011 were extracted and compared with age-related population data on a regional and national level. Results: There were 20 305 patients registered in SveDem during 2008-2011, whereof 352 received a diagnosis of FTD. Mean age at diagnosis for FTD was 69.6 years and almost 70% of FTD cases were 65 years or older at the time of diagnosis. Both FTD and AD showed an increased incidence with age, which reached a maximum in the age group 80-84 years at 6.04 and 202 cases per 100 000 person-years, respectively. The proportion of cases with a positive family history was significantly lower in FTD than in AD. Conclusions: Contrary to general opinion within the field, data from SveDem show that the incidence of FTD increases with age, and that the majority of cases are diagnosed after the age of 65 years. In addition, data from SveDem might suggest that the importance of hereditary factors in general is similar in FTD and AD. The recognition of these findings has important consequences for the diagnosis, treatment and care of patients with FTD. © 2014 Nilsson et al.

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Nilsson, C., Waldö, M. L., Nilsson, K., Santillo, A., & Vestberg, S. (2014). Age-related incidence and family history in Frontotemporal dementia: Data from the Swedish Dementia Registry. PLoS ONE, 9(4). https://doi.org/10.1371/journal.pone.0094901

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