How to measure healthy ageing: a systematic review based on the World Health Organization's Healthy Ageing framework

Review question / Objective: 1.What are the most used multidimensional comprehensive indicators, to assess and healthy aging based on the World Health Organization's Healthy Ageing framework?2. What are the quantitative methods used to measure healthy ageing based on the World Health Organization's Healthy Ageing framework?3. What are the key determinants of healthy ageing based on the World Health Organization's Healthy Ageing framework?Condition being studied: At present, a lot of reviews have been carried out in healthy ageing.These reviews provided overviews of the concept of healthy ageing, concluded domains and measurements of healthy aging, explored the relationship between socioeconomic position , lifestyle behaviour , residential greenspace and healthy ageing.But, in these reviews, there are some common problem:(1)when they formulate search strategies for healthy aging, the search strategies include all the theories of ageing(such as healthy ageing, active ageing, productive ageing, successful ageing).This inconsistency in healthy ageing definitions lead to heterogeneity of outcome, which is a limitation to healthy ageing research, (2)none of them review the methods of calculating healthy ageing score, (3)none of them review the criteria whether healthy aging has been achieved, (4)none of them review the methods of evaluating trajectories of health ageing.INPLASY registration number: This protocol was registered with the International Platform of Registered Systematic Review and Meta-Analysis Protocols (INPLASY) on 31 March 2022 and was last updated on 31 March 2022 (registration number INPLASY202230179).