The 90+ Study
The 90+ study investigates aging and dementia in adults aged 90 and above. The study recruits adults aged 90 and older from Southern California in the United States of America. At baseline, over 900 participants were recruited from the Leisure World Cohort Study (LWCS) which began in 1981. Participants are followed up every six months by the study team. Participants are also given the option to donate their brains after death to allow post-mortem studies. The cohort is comprised of mostly women (66%) who are white, well-educated, and upper middle class.
Study design
Cohort
Number of participants at first data collection
950 (participants)
Recruitment is ongoing
Age at first data collection
≥ 90 years (participants)
Participant year of birth
Varied (participants)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
2003
Primary Institutions
University of California, Irvine (UCI)
Profile paper DOI
Funders
National Institute on Aging (NIA)
Ongoing?
Yes
Data types collected
- Computer, paper or task testing (e.g. cognitive testing, theory of mind doll task, attention computer tasks)
- Interview – face-to-face
- Interview – phone
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Secondary data
- Self-report questionnaire – paper or computer assisted
- None
- Magnetic Resonance Imaging (MRI)
- Positron Emission Tomography (PET)
- Existing research data
Engagement
Keywords
Consortia and dataset groups
