This research group evaluates the burden of chronic disease on quality of life at older age. Specifically, the group examines if and to what extent quality of life is reduced in groups of seniors with hip fractures, osteoarthritis of the knee, falls and sarcopenia. Several research questions will be addressed within these disease groups: Are there differences in quality of life as a function of gender, age, and indicators of functionality within these chronic disease groups? What are possible predictors of improvement of quality of life? Does quality of life recover after functional impairment related to these chronic disease groups?