WHO Study on global AGEing and adult health (SAGE)
WHO's SAGE is a longitudinal study collecting data on adults aged 50 years and older, plus a smaller comparison sample of adults aged 18–49 years, from nationally representative samples in China, Ghana, India, Mexico, Russian Federation and South Africa. The map here also indicates, with dots, other country research collaborations and SAGE sub-studies.
SAGE is supported by the US National Institute on Aging, Division of Behavioral and Social Research and national governments. WHO provides salary and in-kind support.