SAGE Validation Sub-Study (SVSS)

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 is a sub-study conducted in partnership with Dr. S.N. Medical College(Jodhpur, India). WHO SAGE-PAVS is a sub-study conducted in partnership with Dr. S.N. Medical Coll