%0 Journal Article %T ICC-dementia (International Centenarian Consortium - dementia): an international consortium to determine the prevalence and incidence of dementia in centenarians across diverse ethnoracial and sociocultural groups %+ Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, UNSW Medicine, University of New South Wales, Sydney %+ Boston University School of Medicine (BUSM) %+ Albert Einstein College of Medicine [New York] %+ University of Cambridge [UK] (CAM) %+ The Chinese University of Hong Kong [Hong Kong] %+ University of California [Irvine] (UC Irvine) %+ Osaka University [Osaka] %+ Lund University [Lund] %+ Keio University School of Medicine [Tokyo, Japan] %+ VU University Medical Center [Amsterdam] %+ Oregon Health and Science University [Portland] (OHSU) %+ IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri" %+ Università degli Studi di Udine - University of Udine [Italie] %+ Iowa State University (ISU) %+ University of Georgia [USA] %+ UNSW Faculty of Medicine [Sydney] %+ CERMES3 - Centre de recherche Médecine, sciences, santé, santé mentale, société (CERMES3 - UMR 8211 / U988 / UM 7) %+ Sahlgrenska University Hospital [Gothenburg] %+ Medical University of Silesia (SUM) %+ Universitat de València (UV) %A Brodaty, H %A Woolf, C %A Andersen, S %A Barzilai, N %A Brayne, C %A Cheung, Ks %A Corrada, Mm %A Crawford, Jd %A Daly, C %A Gondo, Y %A Hagberg, B %A Hirose, N %A Holstege, H %A Kawas, C %A Kaye, J %A Kochan, Na %A Lau, Bh %A Lucca, U %A Marcon, G %A Martin, P %A Poon, Lw %A Richmond, R %A Robine, Jean-Marie %A Skoog, I %A Slavin, Mj %A Szewieczek, J %A Tettamanti, M %A Viña, J %A Perls, T %A Sachdev, Ps %< avec comité de lecture %@ 1471-2377 %J BMC Neurology %I BioMed Central %V 16 %P 52 %8 2016 %D 2016 %R 10.1186/s12883-016-0569-4 %M 27098177 %K Centenarians %K Dementia %K Incidence %K International %K Prevalence %K Risk factors %Z Humanities and Social SciencesJournal articles %X Background : Considerable variability exists in international prevalence and incidence estimates of dementia. The accuracy of estimates of dementia in the oldest-old and the controversial question of whether dementia incidence and prevalence decline at very old age will be crucial for better understanding the dynamics between survival to extreme old age and the occurrence and risk for various types of dementia and comorbidities. International Centenarian Consortium - Dementia (ICC-Dementia) seeks to harmonise centenarian and near-centenarian studies internationally to describe the cognitive and functional profiles of exceptionally old individuals, and ascertain the trajectories of decline and thereby the age-standardised prevalence and incidence of dementia in this population. The primary goal of the ICC-Dementia is to establish a large and thorough heterogeneous sample that has the power to answer epidemiological questions that small, separate studies cannot. A secondary Aim : is to examine cohort-specific effects and differential survivorship into very old age. We hope to lay the foundation for further investigation into risk and protective factors for dementia and healthy exceptional brain ageing in centenarians across diverse ethnoracial and sociocultural groups. METHODS: Studies focusing on individuals aged >/=95 years (approximately the oldest 1 percentile for men, oldest 5th percentile for women), with a minimum sample of 80 individuals, including assessment of cognition and functional status, are invited to participate. There are currently seventeen member or potential member studies from Asia, Europe, the Americas, and Oceania. Initial attempts at harmonising key variables are in progress. DISCUSSION: General challenges facing large, international consortia like ICC-Dementia include timely and effective communication among member studies, ethical and practical issues relating to human subject studies and data sharing, and the challenges related to data harmonisation. A specific challenge for ICC-Dementia relates to the concept and definition of'abnormal' in this exceptional group of individuals who are rarely free of physical, sensory and/or cognitive impairments. %G English %2 https://cnrs.hal.science/hal-03480523/document %2 https://cnrs.hal.science/hal-03480523/file/s12883-016-0569-4.pdf %L hal-03480523 %U https://cnrs.hal.science/hal-03480523 %~ SHS %~ INSERM %~ UNIV-PARIS5 %~ CNRS %~ EHESS %~ CERMES3 %~ USPC %~ UNIV-PARIS %~ UP-SOCIETES-HUMANITES