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Is the association between tooth loss and frailty among Chinese older adults the mediating role of dietary diversity?

According to a 2023 study using data from the Chinese Longitudinal Healthy Longevity Survey (CLHLS), severe tooth loss is significantly associated with a higher likelihood of frailty among Chinese older adults. This raises a critical question: is the association between tooth loss and frailty among Chinese older adults the mediating role of dietary diversity?