Cohort of Swedish Men (COSM)
The COSM is a population-based prospective cohort study established in Central Sweden (Västmanland and Örebro Counties) in the fall of 1997. All men, born between 1918 and 1952 (totalling 100,303 men), received an invitation to participate in the study. Almost 50,000 (49% response rate) men returned a completed questionnaire, and after exclusions, over 45,000 men remained in the cohort. In the baseline sample, the average age of men was 52.9 years, and 76.3% were married or living with a partner. Follow-up questionnaires were sent in 2008, 2009, and 2019. The COSM is linked annually to multiple registries, including the Health Data Registries and Quality Registries (national and regional) in Sweden.
Study design
Cohort
Number of participants at first data collection
45,906 (participants)
Recruitment is ongoing
Age at first data collection
45 - 79 years (participants)
Participant year of birth
1918 - 1952 (participants)
Participant sex
Male
Representative sample at baseline?
Swedish population of men.
Sample features
Country
Year of first data collection
1997
Primary Institutions
Karolinska Institute (Karolinska Institutet, KI)
Uppsala University (Uppsala universitet, UU)
Profile paper DOI
Not available
Funders
Karolinska Institute (Karolinska Institutet, KI)
Swedish Research Council (Vetenskapsrådet)
Ongoing?
Yes
Data types collected
- Interview – phone
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Self-report questionnaire – paper or computer assisted
- None
- None
- Census data
- Education data
- Employer data
- Healthcare data
- Mortality data
Engagement
Keywords
Consortia and dataset groups
