Health statistics and information systems

SAGE Waves 0, 1, 2 & 3


The WHO Evidence, Measurement and Analysis unit (formerly the Multi-Country Studies unit) developed the Study on Global AGEing and Adult Health (SAGE) as part of an ongoing program of work to compile comprehensive longitudinal information on the health and well-being of adult populations and the ageing process. The core SAGE collects data on adults aged 18+ years, with an emphasis on populations aged 50+ years, from nationally representative samples in six countries: China, Ghana, India, Mexico, Russian Federation and South Africa.

Household and individual level micro- and meta-data, along with survey materials, are available from:

  • SAGE Wave 0 (2002–2004)
  • SAGE Wave 1 (2007–2010)
  • SAGE Wave 2 (2014/15)
  • SAGE Wave 3 will be implemented in 2017

Fund-raising for SAGE Wave 4 and beyond is ongoing.