Insurance Medicine All Sweden (IMAS)
IMAS is a large-scale interdisciplinary project that aims to generate knowledge about different aspects of sickness absence and disability pension in Sweden. The dataset includes data linked from different nationwide registers administered by Statistics Sweden, the National Board of Health and Welfare, the Swedish Social Insurance Agency, and Region Stockholm. IMAS contains linked microdata for eight different population-based cohorts from various time periods, encompassing a total of over 14 million people across several generations, including some who are deceased or have emigrated. Participants are followed both retrospectively and prospectively, with data available since 1961. Several different studies using this data have been conducted or are ongoing.
Study design
Cohort, Cohort - intergenerational
Number of participants at first data collection
~ 14,000,000 (participants, as of 2025)
Recruitment is ongoing
Age at first data collection
Varied (participants)
Participant year of birth
Varied (participants)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
1961
Primary Institutions
Karolinska Institute (Karolinska Institutet, KI)
Links
ki.se/en/cns/insurance-medicine-all-sweden-imas
su.se/rewhard-forskningsinfrastruktur/om-rewhard/insurance-medicine-all-sweden-imas-1.637881
Profile paper DOI
Funders
Swedish Research Council (Vetenskapsrådet)
Swedish Research Council for Health, Working Life and Welfare (Forskningsrådet för arbetsliv, hälsa och välfärd, FORTE)
Ongoing?
Yes
Data types collected
- Secondary data
- None
- None
- Census data
- Healthcare data
- Medical birth registry
- Mortality data
- Tax, income & benefit data
Engagement
Keywords
