Health statistics and information systems

SAGE Waves 0, 1, 2 & 3

SAGE Wave 2: 2014/15

Implementation of the full SAGE Wave 2 follow-up was completed in China, Ghana, India, Mexico, and South Africa by the end of 2015. Data is expected to be available in the public domain by mid-2017 - due to technical issues with the CAPI program.

Sample sizes

SAGE will maintain its two target populations: a large sample of persons aged 50 years and older which is the focus of the study and a smaller comparative sample of persons aged 18-49 years. It will also age-in younger adults and have replacements for losses to follow-up in each country to maintain the sample sizes. Efforts were made to increase the sample size and improve response rates in Mexico compared to Wave 1.

Survey materials

The psychometric properties of the standardized SAGE survey instruments were re-examined, and questionnaires revised for pilot testing. Pilot test results (first 100 interviews) will be reviewed for feedback prior to full implementation of Wave 2. The final questionnaires and survey materials are available on this website.

Country-specific adaptations for SAGE questionnaires and data will be made available on request.

Data users agreement

The USC Center for Economic and Social Research (CESR) was engaged to develop the CAPI in MMIC. Mexico used their own CAPI system.


Support has been provided by WHO and the Division of Behavioral and Social Research at the US National Institute on Aging, through Interagency Agreements (OGHA 04034785; YA1323-08-CN-0020; Y1-AG-1005-01) and research grant R01AG034479. As with previous waves, additional in-kind and financial support from countries was needed, with support from Ministry/Departments of Health.