— Longitudinal Population Analysis Based on the “Pace of Aging” Method 1. Research Background and Scientific Significance With the acceleration of global population aging, objectively measuring and improving the health status of the elderly has become an important issue in social policy and public health worldwide. Traditionally, measurements of po...

1. Academic Background: From Lifespan Extension to the Enhancement of Healthspan With the improvement of global medical and socioeconomic standards since the 20th century, overall human lifespan has significantly increased, especially in developing countries. However, healthspan—the number of years an individual lives in a state of complete health,...