Individual Study / 90 +

90+ Study

90+ Study

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Initiatives -
To study the oldest-old, the fastest growing age group in the United States. Goals of the study: * Determine factors associated with longevity: What makes people live to age 90 and beyond? What types of food, activities or lifestyles are associated with living longer? * Examine the epidemiology of dementia in the oldest-old: How many people aged 90 and older have dementia? How many become demented each year? What are ways to remain dementia-free into your 90s? * Examine rates of cognitive and functional decline in the oldest-old: How do memory loss and disability affect those in their 90s? How can people prevent memory loss and disability at this age? * Examine clinical pathological correlations in the oldest-old: Do the brains of people in their 90s show evidence of memory loss and dementia? Do people with dementia have differences in their brains that can be detected and treated? Determining Modifiable Risk Factors for Mortality and Dementia: What kinds of things can people change in their lives to live longer? Can people change their risk of dementia through diet, exercise or supplements? ****
Start Year
Visit 90 +


Investigators Contacts
  • Dr. Prof. Claudia H. Kawas
    University of California


Study design
Population cohort
Follow Up
Participants of The 90+ Study are visited every six months by researchers who perform neurological and neuropsychological tests.

Marker Paper

Kawas C. H. (2008). The oldest old and the 90+ Study. Alzheimer's & dementia : the journal of the Alzheimer's Association, 4(1 Suppl 1), S56–S59.

PUBMED 18632002


Sources of Recruitment
  • Individuals

Number of participants

Number of participants
Number of participants with biosamples


Availability of data and biosamples