Norwegian Twin Registry (NTR)
The NTR is a research resource that was compiled in 2009 by merging several twin cohorts that were established for research into physical and mental health, wellbeing, and development. As of 2024, the register contains information from around 40,000 twin individuals born between 1915 and 2001. The 1915–1960 cohorts were recruited in the 1980s and followed up over a ten-year period. The twins who were born in the period of 1967–1979 were recruited in the 1990s, and most of the youngest cohorts were recruited in 2014 and 2021.
Study design
Registry, Cohort - twin, Cohort - open, Cohort - birth
Number of participants at first data collection
~ 40,000 (twin individuals)
Recruitment is ongoing
Age at first data collection
Varied (participants)
Participant year of birth
1915 - 2001 (participants)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
2009
Primary Institutions
Norwegian Institute of Public Health (Folkehelseinstituttet, FHI, NIPH)
Oslo University Hospital (Oslo universitetssykehus)
University of Oslo (Universitetet i Oslo)
Profile paper DOI
Funders
Norwegian Institute of Public Health (Folkehelseinstituttet, FHI, NIPH)
Ongoing?
Yes
Data types collected
- Interview – face-to-face
- Interview – phone
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Secondary data
- Self-report questionnaire – unspecified
- None
- None
- Education data
- Employer data
- Healthcare data
- Medical birth registry
- Mortality data
- Social care data
- Tax, income & benefit data
Engagement
Keywords
Consortia and dataset groups
