J Rheumatol 2019 10 1;46(10):1401-1405. Epub 2019 Apr 1.
From the Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre; UK National Institute for Health Research (NIHR) Manchester Biomedical Research Centre, Manchester University Hospitals National Health Service (NHS) Foundation Trust, Manchester Academic Health Science Centre, Manchester; Arthritis Research UK/Medical Research Council (MRC) Centre for Musculoskeletal Health and Work, University of Southampton, Southampton; National Rheumatoid Arthritis Society (NRAS), Maidenhead, UK; Department of Medicine, and the Division of Rheumatology, University of British Columbia, Vancouver; Arthritis Research Canada, Richmond, British Columbia; Institute for Work & Health; University of Toronto, Toronto; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada; Division of Rheumatology, Maastricht University Medical Center, Care and Public Health Research Institute (CAPHRI), Maastricht; Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, the Netherlands; Department of Rehabilitation and Movement Science, University of Vermont, Burlington, Vermont, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Rheumatology, Lund, Sweden; Carol Davila University of Medicine, Bucharest, Romania; School of Public Health and Community Medicine, University of New South Wales, Kensington, Australia.
Objective: The Outcome Measures in Rheumatology (OMERACT) Worker Productivity Group continues efforts to assess psychometric properties of measures of presenteeism.
Methods: Psychometric properties of single-item and dual answer multiitem scales were assessed, as well as methods to evaluate thresholds of meaning.
Results: Test-retest reliability and construct validity of single item global measures was moderate to good. The value of measuring both degree of difficulty and amount of time with difficulty in multiitems questionnaires was confirmed. Thresholds of meaning vary depending on methods and external anchors applied.
Conclusion: We have advanced our understanding of the performance of presenteeism measures and have developed approaches to describing thresholds of meaning.