Origin of Variances in the Oldest-Old (OCTO-Twin)
OCTO-Twin aimed to investigate the etiology of individual differences among twin-pairs age 80 and older, on a range of domains including health and functional capacity, cognitive functioning, psychological well-being, personality and personal control. A total of 351 same-sex twin pairs who were aged 80 or older were recruited from the Swedish Twin Registry. The study consisted of 5 waves of data collection at 2-year intervals between 1991 and 2002.
Study design
Cohort - twin
Number of participants at first data collection
351 (twin pairs)
Age at first data collection
≥ 80 years
Participant year of birth
Varied
Participant sex
All
Representative sample at baseline?
Similarly aged individuals in Sweden in gender, years of education, and ethnicity.
Sample features
Country
Year of first data collection
1991
Primary Institutions
University of Gothenburg (Göteborgs universitet)
Links
gu.se/forskning/octo-twin-studien-en-studie-av-tvillingpar-80-ar-och-aldre-i-sverige
Profile paper DOI
Funders
National Institutes of Health (NIH)
Ongoing?
No
Data types collected
- Interview – face-to-face
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Secondary data
- Self-report questionnaire – paper or computer assisted
- None
- None
- Census data
- Healthcare data
- Medical birth registry
- Mortality data
Engagement
Keywords
Consortia and dataset groups
