Origin of Variances in the Oldest-Old: Octogenarian Twins

Overview

Acronym
OCTO-Twin
Website
OCTO-Twin
Investigators
  • Prof. Linda Hassing

    University of Gothenburg

Contacts
  • Prof. Linda Hassing

    University of Gothenburg

General Design

Study design
Cohort
Start Year
1991
End Year
2002
General Information on Follow Up (profile, frequency)

Participants were assessed up to 5 times at 2-year intervals providing up to 8 years of follow-up

Recruitment Target
  • Families
Number of Participants
702
Number of Participants with Biological Samples
552

Access

Availability of data and biosamples

Possible Access to Data
Possible Access to Biosamples
Other

Marker Paper

[McClearn, G. E., Johansson, B., Berg, S., Pedersen, N. L., Ahern, F., Petrill, S. A., et al. (1997). Substantial genetic influence on cognitive abilities in twins 80 or more years old. Science, 276, 1560-1563.]

PUBMED 9171059

Timeline

Population

OCTO-Twin - Population

Selection Criteria

Minimum age
79
Maximum age
98
Countries
  • Sweden

Sources of Recruitment

Specific Population
  • Other specific population : The Swedish population-based Twin Registry

Sample Size

Number of Participants
702
Number of Participants with Biological Samples
552
Supplementary Information

351 twin pairs, including 149 identical or monozygotic (MZ) pairs, and 202 same-sex fraternal or dizygotic (DZ) twin pairs

Data Collection Events

# Name Description Start End
0 OCTO-Twin - wave 1 1991 (February) 1994 (March)
1 OCTO-Twin - wave 2 1993 (May) 1996 (May)
2 OCTO-Twin - wave 3 1995 (April) 1998 (May)
3 OCTO-Twin - wave 4 1997 (April) 2000 (May)
4 OCTO-Twin - wave 5 1999 (December) 2002 (March)

Individual Studies Included

Acronym Name Study design Participants Countries

Harmonization Projects Included

Acronym Name

Networks

Acronym Name Studies

Datasets

Name Type Data Collection Events Variables
Last Update: 2020-12-07 16:11