The mediating and moderating effect of health-promoting lifestyle on frailty and depressive symptoms for Chinese community-dwelling older adults: A cross-sectional study

Background: This study aims to explore the mediating and moderating effect of health-promoting lifestyles on the relationship between frailty and depressive symptoms to provide a practical reference for effectively promoting the mental health of older adults. Methods: A cross-sectional survey of community-dwelling older adults (n = 3107) was conducted in three cities of Ningxia Province, China. Depressive symptoms, frailty, and health-promoting lifestyles were assessed through the 30-item Geriatric Depression Scale, frailty scale, and health-promoting Lifestyle profile-II, respectively. The Bootstrap methods PROCESS program is employed to test the mediation and moderation model. Results: The findings indicated that health-promoting lifestyles are negatively related to depressive symptoms and frailty, while frailty is positively associated with depressive symptoms. Health-promoting lifestyles have mediated the relationship between frailty and depressive symptoms. Besides, the health-promoting lifestyles weakened the positive relationship between frailty and depression symptoms; there existed a moderating effect of health-promoting lifestyles on the relationship between frailty and depression symptoms among older adults. Limitations: Given the cross-sectional study, it is impossible to make causal inferences. Conclusions: A health-promoting lifestyle might be a protective factor for older adults' health in China. The mediating and moderating effect of a health-promoting lifestyle on the relationship between frailty and depression symptoms among older adults should be integrated to achieve maximum utility. Healthcare practitioners and medical service personnel are recommended to advance health education and publicity, encouraging healthy lifestyles among community-dwelling older adults with frailty to prevent depressive symptoms and promote healthy aging.