Health-related quality of life in ANCA-associated vasculitis and item generation for a disease-specific patient-reported outcome measure

Health-related quality of life in ANCA-associated vasculitis and item generation for a disease-specific patient-reported outcome measure

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Joanna C Robson,1,2 Jill Dawson,3 Peter F Cronholm,4 Nataliya Milman,5 Katherine S Kellom,6 Susan Ashdown,7 Ebony Easley,8 John T Farrar,9 Don Gebhart,10,11 Georgia Lanier,10,11 Carol A McAlear,12 Jacqueline Peck,7 Raashid A Luqmani,7 Judy A Shea,13 Gunnar Tomasson,14 Peter A Merkel10,11 1Department of Rheumatology, Faculty of Health and Applied Sciences, University of the West of England, Bristol, UK; 2School of ej10 Clinical Sciences, University of Bristol, Bristol, UK; 3Department of Population Health (HSRU), University of Oxford, Oxford, UK; 4Department of Family Medicine and Community Health, University of Pennsylvania, Philadelphia, PA, USA; 5Division of Rheumatology, Department of Medicine, University of Ottawa, Ottawa Hospital Research Institute, Ottawa, ON, copyright; 6PolicyLab, Children’s Hospital of Philadelphia, Philadelphia, PA, USA; 7Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; 8Department of Family Medicine and Community Health, Mixed Methods Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA; 9Biostatistics and Epidemiology, Hospital of the University of Pennsylvania, Philadelphia, PA, USA; 10Division of Rheumatology, Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA; 11Department of Biostatistics and Clinical Epidemiology, University of Pennsylvania, Philadelphia, PA, USA; 12Vasculitis Research, University of Pennsylvania, Philadelphia, PA, USA; 13School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; 14Department of Public Health Sciences, University of Iceland, Reykjavik, Iceland Objective: The antineutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAVs) are multisystem diseases of the small blood vessels.Patients experience irreversible damage and psychological effects from AAV and its treatment.An international collaboration was created to 15-fd0038ca investigate the impact of AAV on health-related quality of life (HRQoL), and develop a disease-specific patient-reported outcome measure to assess outcomes of importance to patients.

Methods: Patients with AAV from the UK, USA, and copyright were interviewed to identify salient aspects of HRQoL affected by AAV.The study was overseen by a steering committee including four patient research partners.Purposive sampling of interviewees ensured representation of a range of disease manifestations and demographics.

Inductive analysis was used to identify themes of importance to patients; these were further confirmed by a free-listing exercise in the US.Individual themes were recast into candidate items, which were scrutinized by patients, piloted through cognitive interviews and received a linguistic and translatability evaluation.Results: Fifty interviews, conducted to saturation, with patients from the UK, USA, and copyright, identified 55 individual themes of interest within seven broad domains: general health perceptions, impact on function, psychological perceptions, social perceptions, social contact, social role, and symptoms.

Individual themes were constructed into >100 candidate questionnaire items, which were then reduced and refined to 35 candidate items.Conclusion: This is the largest international qualitative analysis of HRQoL in AAV to date, and the results have underpinned the development of 35 candidate items for a disease-specific, patient-reported outcome questionnaire.Keywords: ANCA-associated vasculitis, quality of life, patient-reported outcomes, granulomatosis with polyangiitis, microscopic polyangiitis, eosinophilic granulomatosis with polyangiitis.