The effect of aging and duration of disability on long term health outcomes following spinal cord injury

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Abstract
The purpose of the study was to discover the independent and combined effects of age and duration of injury on selected long term health outcomes of 83 spinal cord injured (SCI) men (age range 21–79 years; duration of spinal cord injury 3–52 years). Specifically, the study examined a multivariate model which specified that age, duration, the interaction of age and duration, and level of lesion were related to the following health outcomes: pain, fatigue, functional independence, mobility, illness and symptomatology, perceived overall health, social support, life satisfaction, and economic stability. Age had significant main effects on three outcomes. With increasing age, the sample experienced more fatigue, decreased activity (due to pain), and more overall satisfaction with their lives. Duration of SCI showed significant main effects on two outcomes. As subjects lived longer with their SCI, they felt less financially secure and experienced more symptoms and illnesses. Significant interaction effects of age and duration of SCI were found for two outcomes. Older age combined with longer duration of SCI amplified subjects' perceptions of financial insecurity, and threats to health. The findings send a clear message to service-providers and policy makers about the added vulnerability of older disabled individuals, about the need for extra vigilance in health care issues, and about the necessity of a social-economic safety net for already disadvantaged individuals.