Construct validity of PROMIS pain interference, fatigue, and physical function as patient-reported outcomes in adults with idiopathic inflammatory myopathies: An international study from the OMERACT myositis working group
Ellen Romich , Didem Saygin , Dana DiRenzo , Christopher A. Mecoli , Ingrid de Groot , Karin Lodin , Malin Regardt , Catherine Sarver , Ju Yeon Kim , Jin Kyun Park , Kelly Beer , Merrilee Needham , Helene Alexanderson , Lisa Christopher-Stine , Marianne de Visser , Joost Raaphorst , OMERACT Myositis Working Group
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引用次数: 0
Abstract
Background
Validated patient-reported outcome measures to assess disease impact in patients with adult idiopathic inflammatory myopathies (IIMs) are needed. The objective of this study was to assess the construct validity of PROMIS Pain Interference, Fatigue, and Physical Function measures in comparison with core disease activity measures.
Methods
Adults with IIM, excluding inclusion body myositis, from OMERACT Myositis Working Group (MWG) clinic sites completed PROMIS Short Form v1.0—Pain Interference 6a, PROMIS Short Form v1.0—Fatigue 7a, and PROMIS Short Form v2.0—Physical Function 8b measures. Core disease activity measures including patient and physician global disease activity assessments, manual muscle testing, serum creatine kinase activity, and Health Assessment Questionnaire Disability Index (HAQ-DI) were simultaneously assessed. To evaluate construct validity, a priori hypotheses for the expected correlations between PROMIS measures, age, and core disease measures were determined by >70 % agreement among MWG members and were compared against observed Pearson's correlations. Internal consistency of items and floor or ceiling effects for the PROMIS measures were also assessed. Subgroup analysis according to IIM subtype (dermatomyositis vs. non-dermatomyositis IIM) was performed.
Results
135 adults with IIM from 5 countries across North America, Europe, Asia, and Australia were included. For construct validity, a priori hypotheses were confirmed for 5 of 6 (83 %) PROMIS Pain Interference, 4 of 5 (80 %) PROMIS Fatigue, and 3 of 4 (75 %) PROMIS Physical Function correlations. Internal consistency was high for each PROMIS measure (Cronbach's alpha >0.9). Ceiling effects were observed only for PROMIS Pain Interference, with low/no pain in 29 % of patients. Subgroup analysis between dermatomyositis (n = 65) and non-dermatomyositis (n = 70) subtypes demonstrated similar correlations between PROMIS measures and disease activity measures.
Conclusions
PROMIS Short Form v1.0—Pain Interference 6a, PROMIS Short Form v1.0—Fatigue 7a, and PROMIS Short Form v2.0—Physical Function 8b measures demonstrate strong construct validity when compared to core disease activity measures in IIM, with consistent results across IIM subtypes. These findings support the use of these selected PROMIS measures to assess core domains of interest for measuring life impact in IIMs.
期刊介绍：
Seminars in Arthritis and Rheumatism provides access to the highest-quality clinical, therapeutic and translational research about arthritis, rheumatology and musculoskeletal disorders that affect the joints and connective tissue. Each bimonthly issue includes articles giving you the latest diagnostic criteria, consensus statements, systematic reviews and meta-analyses as well as clinical and translational research studies. Read this journal for the latest groundbreaking research and to gain insights from scientists and clinicians on the management and treatment of musculoskeletal and autoimmune rheumatologic diseases. The journal is of interest to rheumatologists, orthopedic surgeons, internal medicine physicians, immunologists and specialists in bone and mineral metabolism.
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