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) (Academic, United States of America)
Profile paper DOI
Funders
National Institute on Aging (NIA) (Government, United States of America)
United States Department of Veterans Affairs (VA) (Government, United States of America)
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
