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The Economics of Presenteeism in the context of Rheumatoid Arthritis, Ankylosing Spondylitis and Psoriatic Arthritis

Jones, Cheryl Jayne

[Thesis]. Manchester, UK: The University of Manchester; 2018.

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Abstract

Abstract Background Presenteeism is an economic concept that is difficult to identify, measure, and value. Rheumatoid arthritis (RA), ankylosing spondylitis (AS) and psoriatic arthritis (PsA) are three chronic auto-immune conditions that increase levels of presenteeism. Workplace interventions (WPIs) help individuals to manage their health condition at work. Existing methods used to quantify the impact of presenteeism are unable to adequately inform the employer of the productive benefits of WPIs. The overall aim of this thesis was to appraise current methods used to quantify presenteeism and to develop methods to value the impact of presenteeism suitable for use in economic evaluations (EE) of WPIs. Methods Two systematic reviews were conducted: 1) to assess the extent to which self-report measure of presenteeism were underpinned by economic theory; and 2) to explore if, and how, productivity was quantified and included in EE of WPIs for musculoskeletal conditions (MSDs). Thematic analysis methods were used to analyse qualitative data collected from working individuals with RA, AS or PsA (n=22) that explored the extent to which measures of health status (EQ5D; SF6D) and capability (ICECAP-A) capture the impact on ability to work caused by RA, AS or PsA. Econometric methods were used to specify prediction models that included measures of health status, capability and presenteeism, using a sample of 542 working people with RA and AS. Results The first systematic review identified 24 self-report measures of presenteeism; all, except one measure were not underpinned by economic theory. The second systematic review identified 20 EE of WPIs for MSDs. Absenteeism was included in all studies (n=20); however, presenteeism was included in only four. The qualitative data confirmed measures of health status and capability had the ability to capture those aspects of RA, AS and PsA that impact an individualâ€™s ability to work. The best performing prediction model used an OLS specification including SF6D, age and gender to predict presenteeism measured by the WPAI. Conclusion The results suggest that HRQoL measures, specifically the SF6D, can be used to capture and predict levels of presenteeism caused by RA, AS and PsA.