Journal
LANCET NEUROLOGY
Volume 10, Issue 9, Pages 819-828Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/S1474-4422(11)70072-2
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Funding
- Alzheimer's Association
- NARSAD
- National Institute on Aging [K24 AG031155]
- University of California, San Francisco, School of Medicine
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At present, about 33-9 million people worldwide have Alzheimer's disease (AD), and prevalence is expected to triple over the next 40 years. The aim of this Review was to summarise the evidence regarding seven potentially modifiable risk factors for AD: diabetes, midlife hypertension, midlife obesity, smoking, depression, cognitive inactivity or low educational attainment, and physical inactivity. Additionally, we projected the effect of risk factor reduction on AD prevalence by calculating population attributable risks (the percent of cases attributable to a given factor) and the number of AD cases that might be prevented by risk factor reductions of 10% and 25% worldwide and in the USA. Together, up to half of AD cases worldwide (17.2 million) and in the USA (2.9 million) are potentially attributable to these factors. A 10-25% reduction in all seven risk factors could potentially prevent as many as 1.1-3.0 million AD cases worldwide and 184000-492000 cases in the USA.
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