The Impact of Income Support Systems on Healthcare Quality and Functional Capacity in Workers with Low Back Pain: A Realist Review

BackgroundLow back pain (LBP) is a leading cause of work disability. While absent from work, workers with LBP may receive income support from a system such as workers compensation or social security. Current evidence suggests that income support systems can influence recovery from LBP, but provides little insight as to why and how these effects occur. This study examines how and in what contexts income support systems impact the healthcare quality for people with work disability and LBP and their functional capacity. MethodsWe performed a realist review, a type of literature review that seeks to explain how social interventions and phenomena in certain contexts generate outcomes, rather than simply whether they do. Five initial theories about the relationship between income support systems and outcomes were developed, tested, and refined by acquiring and synthesising academic literature from purposive and iterative electronic database searching. This process was supplemented with grey literature searches for policy documents and legislative summaries, and semi-structured interviews with experts in income support, healthcare and LBP. ResultsIncome support systems influence healthcare quality through funding restrictions, healthcare provider administrative burden, and allowing employers to select providers. They also influence worker functional capacity through the level of participation and financial incentives for employers, measures to prove the validity of the workers LBP, and certain administrative procedures. These mechanisms are often exclusively context-dependent, and generate differing and unintended outcomes depending on features of the healthcare and income support system, as well as other contextual factors such as socioeconomic status and labour force composition. DiscussionIncome support systems impact the healthcare quality and functional capacity of people with work disability and LBP through context-dependent financial control, regulatory and administrative mechanisms. Research and policy design should consider how income support systems may indirectly influence workers with LBP via the workplace.