According to the World Health Organization 2015 report, healthy aging is defined as an “ongoing process of developing and maintaining the functional ability that enables well-being in older age, with functional ability determined by the interaction of individual’s intrinsic capacity and their environment." Few studies have adequately addressed this concept and various measures have been used in different populations. This limits the potential to compare healthy aging across countries or populations. Following the WHO definition, we have developed a novel scale for healthy aging using self-reported items related to intrinsic capacity and functional ability from a harmonized dataset in the Ageing Trajectories of Health - Longitudinal Opportunities and Synergies (ATHLOS) project. The ATHLOS harmonized dataset included more than 411,000 individuals from 17 international cohorts, covering six cohorts from four Asian countries: the 10/66 Dementia Cohort Study (India and China), CHARLS (China), JSTAR (Japan), KLOSA (South Korea), LASI (India) and SAGE (India and China). During the presentation, we will present the harmonization process of items related intrinsic capacity and functional ability across studies and the methodological development of the scale by using an Item Response Theory approach model. Heterogeneities in the cohort-specific datasets were analyzed and addressed to obtain the common scale. This common scale may contribute to worldwide healthy aging investigations after relevant refinement and further testing.
Albert Sanchez-Niubo, Health Park 'Sant Joan de Déu', Spain
Yu-Tzu Wu, King's College London, United Kingdom
Carlos G Forero, International University of Catalonia, Spain
Iago Gine-Vazquez, Health Park Sant Joan de Déu, Spain
Matthew Prina, King's College London, United Kingdom
Josep Maria Haro, Health Park Sant Joan de Déu, Spain