Oregon Brain Aging Study (OBAS)
OBAS was a longitudinal study initiated in 1989, enrolling 305 community-dwelling, functionally independent older adults from Oregon, USA. Participants were recruited through retirement facilities, senior fairs, advertisements, and clinics, meeting initial inclusion criteria of being aged ≥ 65, functionally independent, and free of significant comorbid illnesses. In 2004, the study expanded to include participants with well-controlled chronic conditions such as hypertension and coronary artery disease. Participants were followed up annually with interim six-month assessments to monitor cognitive and neurological changes.
Study design
Cohort
Number of participants at first data collection
305 (participants)
Age at first data collection
≥ 65 years (participants)
Participant year of birth
Varied (participants)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
1989 (participants)
Primary Institutions
Oregon Health & Science University (OHSU)
Profile paper DOI
Funders
National Institute on Aging (NIA)
United States Department of Veterans Affairs (VA)
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-completed questionnaire – paper or computer assisted
- None
- Computerized tomography (CT)
- Magnetic Resonance Imaging (MRI)
- Healthcare data
Engagement
Keywords
Consortia and dataset groups
