WHO Study on Global AGEing and Adult Health (SAGE)
The core SAGE collects data on adults aged over 18 years, with an emphasis on populations aged over 50 years, from nationally representative samples in China, Ghana, India, Mexico, Russian Federation, and South Africa. The focus of the study was to understand ageing in different populations, with younger participants for comparisons. Over 63,000 participants were enrolled, with around 19,000 aged over 50 years and approximately 55% of the total cohort were female. The baseline survey was carried out between 2002 - 2004, with the first follow up between 2007 - 2010, then 2014-2015 and 2018-2019. New participants were added at follow ups to maintain representativeness.
Study design
Cohort
Number of participants at first data collection
63,445 (participants)
Recruitment is ongoing
Age at first data collection
≥ 18 years (participants)
Participant year of birth
Varied (participants)
Participant sex
All
Representative sample at baseline?
The national population of each participating country.
Sample features
Countries
Year of first data collection
2002
Primary Institutions
World Health Organisation (WHO)
Profile paper DOI
Funders
Chinese Center for Disease Control and Prevention (中国疾病预防控制中心 ,CCDC)
Department of Health and Human Services (HHS)
Ministry of Health
National Council on Science and Technology of Mexico (Consejo Nacional de Ciencia y Tecnologia de Mexico (CONACyT)
National Institute on Aging (NIA)
Ongoing?
Yes
Data types collected
- Computer, paper or task testing (e.g. cognitive testing, theory of mind doll task, attention computer tasks)
- Interview – face-to-face
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Self-report questionnaire – paper or computer assisted
- None
- None
- None
Engagement
Keywords
Consortia and dataset groups
