Quality of life among older people with a disability: the role of purpose in life and capabilities

Purpose: Purpose in life and capabilities are two significant individual elements that enhance quality of life among older people. Capabilities refers to the extent to which older people are free to make choices that are important to them. At present, it is not known how purpose in life interacts with capabilities to influence quality of life for those living with a disability. This study examined the extent to which purpose in life and capabilities interacts with health status to affect quality of life, particularly for older people with a disability. Methods: Self-report data from participants in a longitudinal cohort study of older New Zealanders were analyzed. Responses from 452 older people with a disability were compared with 3299 age- and gender-matched older people without a disability on indicators related to health and aging. The associations were tested using hierarchical regression. Mediational impact of purpose in life and capabilities were tested via path analysis. Results: Mental health, physical health, purpose in life, and capabilities accounted for a significant amount of variance in quality of life for older people with a disability. Purpose in life and capabilities were significant unique mediators for older people with a disability. Conclusions: Purpose in life may help older people with a disability to deal with early onset stressors or changes in mental and physical health to maintain overall quality of life. The role of capabilities suggests that the social environment and access to resources and choices are important in ensuring that older people aging with or into a disability achieve quality of life in a socially just environment.