Cross-system patterns of physical, psychological and cognitive multimorbidity and 9-year all-cause mortality among middle-aged and older Chinese adults: a prospective cohort study from the China Health and Retirement Longitudinal Study
Cross-system multimorbidity—the co-occurrence of physical, psychological and cognitive disorders—is increasingly recognised as a defining feature of population ageing, yet its relationship with long-term mortality has rarely been examined at the level of specific combinations. Most studies have used chronic-disease cou...