Study on Global Ageing and Adult Health (SAGE): South Africa, Baseline (Wave 0), 2002-2004
The World Health Organization (WHO)'s Multi-Country Studies unit developed the Study on Global AGEing and Adult Health (SAGE) as part of a Longitudinal Survey Program to compile comprehensive longitudinal information on the health and well being of older adult populations.
The primary objectives of the SAGE survey program are:
- To obtain reliable, valid, and comparable health, health-related, and well-being data over a range of key domains for adult and older adult populations in nationally representative samples;
- To examine patterns and dynamics of age-related changes in health and well-being using longitudinal follow-up of a cohort as they age, and to investigate socioeconomic consequences of these health changes;
- To supplement and cross-validate self-reported measures of health and the anchoring vignette approach to improving comparability of self-reported measures, through measured performance tests for selected health domains; and
- To collect health examination and biomarker data that improves reliability of morbidity and risk factor data and to objectively monitor the effect of interventions.
- To generate large cohorts of older adult populations and comparison cohorts of younger populations for following-up intermediate outcomes, monitoring trends, examining transitions and life events, and addressing relationships between determinants and health, well-being, and health-related outcomes;
- To develop a mechanism to link survey data to demographic surveillance site data;
- To build linkages with other national and multi-country aging studies;
- To improve the methodologies to enhance the reliability and validity of health outcomes and determinants data; and
- To provide a public-access information base to engage all stakeholders, including national policy makers and health systems planners, in planning and decision-making processes about the health and well-being of older adults.