Health statistics and information systems

SAGE longitudinal multi-country study

SAGE Wave 2: 2014

Implementation of the full SAGE Wave 2 follow-up started in mid-2014 in China, Ghana, India, Mexico, Russian Federation and South Africa. Data collection should be completed by the end of 2014, with data available in the public domain in the first half of 2015.

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 will be made to increase the sample size in Mexico.

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 will be posted here prior to study implementation.

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

Data users agreement

The USC Center for Economic and Social Research (CESR) has been engaged to develop the CAPI. This will speed release of data into the public domain.


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). As with previous waves, additional in-kind and financial support from countries will be needed and is being sought.