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Body mass index and risk of dementia : Analysis of individual-level data from 1.3 million individuals

Kivimäki, Mika (author)
Department of Epidemiology and Public Health, University College London, London, United Kingdom / Clinicum, Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland / Finnish Institute of Occupational Health, Helsinki and Turku, Finland
Luukkonen, Ritva (author)
Clinicum, Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland
Batty, G. David (author)
Department of Epidemiology and Public Health, University College London, London, United Kingdom / Centre for Cognitive Ageing and Cognitive Epidemiology, Alzheimer Scotland Dementia Research Centre, University of Edinburgh, Edinburgh, United Kingdom
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Ferrie, Jane E. (author)
School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
Pentti, Jaana (author)
Clinicum, Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland / Finnish Institute of Occupational Health, Helsinki and Turku, Finland
Theorell, Töres (author)
Karolinska Institutet,Stockholms universitet,Stressforskningsinstitutet
Shipley, Martin J. (author)
Department of Epidemiology and Public Health, University College London, London, United Kingdom
Alfredsson, Lars (author)
Karolinska Institutet
Fransson, Eleonor I. (author)
Stockholms universitet,Jönköping University,HHJ, Avdelningen för naturvetenskap och biomedicin,HHJ. ADULT,HHJ. ARN-J (Aging Research Network - Jönköping),Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden / School of Health Sciences and Welfare, Jönköping University, Jönköping, Sweden / Division of Epidemiology, Stress Research Institute, Stockholm University, Stockholm,Stressforskningsinstitutet
Goldberg, Marcel (author)
Population-based Epidemiologic Cohort Unit, UMS 011, Inserm, Villejuif, France
Knutsson, Anders, 1942- (author)
Mittuniversitetet,Avdelningen för hälsovetenskap,Department of Health Sciences, Mid Sweden University, Sundsvall, Sweden
Koskenvuo, Markku (author)
Clinicum, Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland
Kuosma, Eeva (author)
Clinicum, Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland
Nordin, Maria (author)
Stockholms universitet,Umeå universitet,Institutionen för psykologi,Division of Epidemiology, Stress Research Institute, Stockholm University, Stockholm, Sweden / Department of Psychology, Umeå University, Umeå, Sweden,Stockholm University, Stockholm; Umeå University, Umeå,Stressforskningsinstitutet
Suominen, Sakari (author)
Högskolan i Skövde,Institutionen för hälsa och lärande,Forskningsspecialiseringen Hälsa och Lärande,Folkhälsan Research Center, Folkhälsan, Helsinki, Finland; University of Skövde, Skövde; Turku University Hospital, Turku, Finland,Individ och samhälle, Individual and Society (VIDSOC)
Theorell, Töres (author)
Division of Epidemiology, Stress Research Institute, Stockholm University, Stockholm, Sweden
Vuoksimaa, Eero (author)
Clinicum, Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland / Institute for Molecular Medicine (FIMM), University of Helsinki, Helsinki, Finland
Westerholm, Peter (author)
Uppsala universitet,Arbets- och miljömedicin
Westerlund, Hugo (author)
Stockholms universitet,Stressforskningsinstitutet
Zins, Marie (author)
Population-based Epidemiologic Cohort Unit, UMS 011, Inserm, Villejuif, France
Kivipelto, Miia (author)
Karolinska Institutet
Vahtera, Jussi (author)
Turku University Hospital, Turku, Finland / University of Turku, Turku, Finland
Kaprio, Jaakko (author)
Clinicum, Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland / Institute for Molecular Medicine (FIMM), University of Helsinki, Helsinki, Finland
Singh-Manoux, Archana (author)
Umeå universitet,Institutionen för psykologi,Department of Epidemiology and Public Health, University College London, London, UK; Population-based Epidemiologic Cohort Unit, UMS 011, Inserm, Villejuif, France,Department of Epidemiology and Public Health, University College London, London, United Kingdom / Population-based Epidemiologic Cohort Unit, France / Department of Psychology, Umeå University, Umeå, Sweden
Jokela, Markus (author)
Umeå universitet,Institutionen för psykologi,Institute of Behavioral Sciences, University of Helsinki, Helsinki, Finland / Department of Psychology, Umeå University, Umeå, Sweden
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 (creator_code:org_t)
2017-11-20
2018
English.
In: Alzheimer's & Dementia. - : Elsevier. - 1552-5260 .- 1552-5279. ; 14:5, s. 601-609
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Introduction: Higher midlife body mass index (BMI) is suggested to increase the risk of dementia, but weight loss during the preclinical dementia phase may mask such effects. Methods: We examined this hypothesis in 1,349,857 dementia-free participants from 39 cohort studies. BMI was assessed at baseline. Dementia was ascertained at follow-up using linkage to electronic health records (N = 6894). We assumed BMI is little affected by preclinical dementia when assessed decades before dementia onset and much affected when assessed nearer diagnosis. Results: Hazard ratios per 5-kg/m(2) increase in BMI for dementia were 0.71 (95% confidence interval = 0.66-0.77), 0.94 (0.89-0.99), and 1.16 (1.05-1.27) when BMI was assessed 10 years, 10-20 years, and >20 years before dementia diagnosis. Conclusions: The association between BMI and dementia is likely to be attributable to two different processes: a harmful effect of higher BMI, which is observable in long follow-up, and a reverse-causation effect that makes a higher BMI to appear protective when the follow-up is short. (C) 2017 The Authors. Published by Elsevier Inc. on behalf of the Alzheimer's Association.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Hälsovetenskap -- Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Health Sciences -- Public Health, Global Health, Social Medicine and Epidemiology (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Neurologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Neurology (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Hälsovetenskap (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Health Sciences (hsv//eng)

Keyword

body mass index
dementia
cohort study
bias
obesity
Individual and Society VIDSOC
Individ och samhälle VIDSOC

Publication and Content Type

ref (subject category)
art (subject category)

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