World Health Survey Plus is a data collection platform created with WHO Member States to track progress on country specific objectives and to achieve Universal Health Coverage and the Health and Health-Related SDG indicators.
WHO SAGE is 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. Wave 1 total sample size is over 40,000 individuals. Wave 2 interviews were completed in 2014/15 in five countries. Wave 3 data collection was completed in March 2020.
WHO SAGE-WOPS HIV is a sub-study conducted in partnership with the Medical Research Council (MRC), Uganda Virus Research Institute (UVRI), Uganda, and the Africa Centre for Health and Population Studies, South Africa.
WHO SAGE-INDEPTH is conducted in partnership with the International Network for the continuous Demographic Evaluation of Populations and Their Health in developing countries (INDEPTH), with support from the US National Institute on Aging. The goals are to generate needed health data on older adults in lower income countries, to use common measurement strategies across health and demographic surveillance systems (HDSS) to examine ageing and adult health, and to develop methods to link routine surveillance data and longitudinal survey data. The full SAGE instrument was implemented in a random subset of respondents in South Africa (Agincourt), Ghana (Navrongo) and India (Vadu) HDSS fieldsites, resulting in a total sample of almost 1500 individuals.
SAGE is a longitudinal study focused on understanding trends and determinants of health and well-being of older adults. In addition to periodic follow up of the sample, it also includes a research component to improve the measurement of several outcomes and determinants of interest in this population group. This is especially true since SAGE is being implemented in settings where several of the methods have not been used before and the respondents are for the most part from low resource settings. The focus of the validation studies is to improve the measurement of subjective wellbeing and correlate this with biomarkers of emotional states, calibrate self-reports of physical activity with measured levels using accelerometry and validate self-reported symptom based chronic diseases against a gold standard. WHO SAGE-DRMVS and WHO SAGE-PAVS sub-studies were conducted in partnership with Dr. S.N. Medical College(Jodhpur, India).
WHO WHS was implemented in partnership with 69 countries between 2002 and 2004, to generate information on the health of adult populations and health systems. The total sample size, using nationally representative samples, includes over 300,000 individuals aged 18+ years. For four countries, Ghana, India, Mexico and Russia , WHS also serves as SAGE Wave 0.
WHO MCSS was developed as a mechanism to improve the methods for generating comparable data on health and health system responsiveness. This study was implemented in 2000-2001 in nationally representative populations from 61 countries. The total sample size includes almost 200,000 individuals aged 18-years and older.