Abstract:
OBJECTIVE:Advances in health measurement have led to the application of Rasch Item Response Theory (IRT) analysis (Rasch analysis) to evaluate instruments measuring health status and quality of life of patients, including the Health Assessment Questionnaire and SF-36. This study investigated the extent to which the Western Ontario MacMaster osteoarthritis questionnaire (WOMAC) satisfies the Rasch model, particularly in respect to unidimensionality, item separation, and linearity. METHODS:The study included a total of 2205 patients, 1013 with rheumatoid arthritis (RA), 655 with osteoarthritis of the knee or hip (OA), and 537 with fibromyalgia. All patients completed the WOMAC as part of a longitudinal study of rheumatic disease outcomes. To examine whether the WOMAC pain and function scales each fits the Rasch model, the Winsteps program was used to assess item difficulty, scale unidimensionality, item separation, and linearity. RESULTS:Although the WOMAC worked best in OA, regardless of disorder, both the pain and function scales were unidimensional, had adequate item separation, and had a long range (25-150) of linearity in the function scale. Several functional items, however, had a high information weight fit (INFIT) statistic, indicating poor fit to the model. These items included "getting in and out of the bath" and "going down stairs." CONCLUSION:The WOMAC generally satisfies the requirements of Rasch item response theory across all disorders studied, and is an appropriate measure of lower body function in OA, RA and fibromyalgia. Although some individual items do not fit well, it is not likely that removing such items would result in more than overall minimal differences, and it will be difficult to remove traces of multidimensionality while keeping the central constructs of progressive lower body musculoskeletal abnormality intact. In addition, it is possible that a "purer", still more unidimensional instrument would be less useful in clinical trials and epidemiological studies by restricting the range of the scale.
journal_name
Ann Rheum Disjournal_title
Annals of the rheumatic diseasesauthors
Wolfe F,Kong SXdoi
10.1136/ard.58.9.563subject
Has Abstractpub_date
1999-09-01 00:00:00pages
563-8issue
9eissn
0003-4967issn
1468-2060journal_volume
58pub_type
杂志文章abstract:OBJECTIVES:To develop evidence-based EULAR recommendations for cardiovascular (CV) risk management in patients with rheumatoid arthritis (RA), ankylosing spondylitis (AS) and psoriatic arthritis (PsA). METHODS:A multidisciplinary expert committee was convened as a task force of the EULAR Standing Committee for Clinica...
journal_title:Annals of the rheumatic diseases
pub_type: 共识发展会议,杂志文章,实务指引
doi:10.1136/ard.2009.113696
更新日期:2010-02-01 00:00:00
abstract:OBJECTIVE:We sought to determine histologic and gene expression features of clinical improvement in early diffuse cutaneous systemic sclerosis (dcSSc; scleroderma). METHODS:Fifty-eight forearm biopsies were evaluated from 26 individuals with dcSSc in two clinical trials. Histologic/immunophenotypic assessments of glob...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/annrheumdis-2020-217840
更新日期:2021-02-01 00:00:00
abstract::The prostaglandin E (PGE) level in the knee joint fluid was determined by radioimmunoassay before and after anti-inflammatory therapy with flurbiprofen in 8 patients with rheumatoid arthritis (RA) and 4 patients with osteoarthritis (OA). The level of PGE in RA joint fluids before the anti-inflammatory treatment was 9....
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.40.5.462
更新日期:1981-10-01 00:00:00
abstract::This review focuses on the contribution of genetic markers to the severity of radiological damage in rheumatoid arthritis (RA). Currently available biomarkers of more severe disease include elevated erythrocyte sedimentation rates or C-reactive protein levels and rheumatoid factor (RF) or anticyclic citrullinated prot...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,评审
doi:10.1136/ard.2009.117721
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND:Several studies have reported an association between the presence of the shared epitope (SE) and susceptibility to rheumatoid arthritis (RA). Recent studies have shown that certain HLA-DRB1 alleles in combination with predisposing DQB1 and DQA1 alleles may protect against the development of RA. This model is...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.61.4.351
更新日期:2002-04-01 00:00:00
abstract::The prevalence of anticardiolipin antibodies was evaluated in 70 children with juvenile chronic arthritis (JCA), in 25 adult patients with rheumatoid arthritis, in 42 healthy children and in 40 adult controls. Thirty seven (53%) patients with JCA were positive for IgG or IgM anticardiolipin antibodies, or both, and 30...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.50.9.599
更新日期:1991-09-01 00:00:00
abstract::A 62 year old woman taking L-tryptophan developed eosinophilic fasciitis shortly after starting an exercise class. She received prednisone without benefit but improved after azathioprine treatment was started and L-tryptophan was discontinued. As products containing L-tryptophan have recently been implicated in develo...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.50.1.55
更新日期:1991-01-01 00:00:00
abstract:OBJECTIVES:To review case histories of patients in whom fibrosis played a significant role in the pathogenesis of their disease, and to determine whether intravenous gammaglobulin (IVIg) contributed to the regression of their fibrotic condition. METHODS:Eight patients with excess fibrotic reaction in the course of div...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.62.2.175
更新日期:2003-02-01 00:00:00
abstract::(1) The phagocytosis of human IgG, IgM, and C3 by granulocytes from various rheumatoid and nonrheumatoid sera and synovial fluids (SF) was investigated by direct examination of the patient's leucocytes and indirect testing by incubation of normal donor leucocytes with various sera and SF. (2) In rheumatoid arthritis (...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.34.2.146
更新日期:1975-04-01 00:00:00
abstract:OBJECTIVES:To identify genetic associations with hip osteoarthritis (HOA), we performed a meta-analysis of genome-wide association studies (GWAS) of HOA. METHODS:The GWAS meta-analysis included approximately 2.5 million imputed HapMap single nucleotide polymorphisms (SNPs). HOA cases and controls defined radiographica...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,meta分析
doi:10.1136/annrheumdis-2013-205020
更新日期:2015-10-01 00:00:00
abstract::This paper presents the second update of the Assessment in SpondyloArthritis international Society (ASAS) consensus statement on the use of anti-tumour necrosis factor (anti-TNF) agents in patients with axial spondyloarthritis (SpA). A major change from the previous recommendations is that patients fulfilling the ASAS...
journal_title:Annals of the rheumatic diseases
pub_type: 共识发展会议,杂志文章
doi:10.1136/ard.2011.151563
更新日期:2011-06-01 00:00:00
abstract::There is a close relation between T helper (Th) 1 cells and nitric oxide in disease. Thus it is possible that a reciprocal regulatory mechanism exists between them. This paper briefly describes the experimental studies which have helped elucidate the mechanism by which nitric oxide selectively enhances Th 1 cell proli...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,评审
doi:10.1136/ard.2006.058446
更新日期:2006-11-01 00:00:00
abstract::Plasma DNA has been measured by a new physiochemical approach based on fluorimetric analysis of phenol extracted nucleic acids electrophoresed on polyacrylamide gels. This method is specific for native double-stranded DNA of molecular weight greater than 5 x 10(6). The use of plasma rigorously freed of leucocytes is e...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.40.6.593
更新日期:1981-12-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to assess the value of power Doppler ultrasound (PDUS) in combination with routine management in a cohort of patients with very early inflammatory arthritis (IA). METHODS:50 patients with < or =12 weeks of inflammatory symptoms with or without signs had clinical, laboratory and ima...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.2008.106658
更新日期:2010-02-01 00:00:00
abstract::The presence of anergy and its relationship to malnutrition was investigated in patients with rheumatoid arthritis (RA) and in controls. A generalised reduction in delayed cutaneous hypersensitivity to 7 recall antigens were found in 104 RA patients compared with 67 controls. No measured of the disease was capable of ...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.43.3.430
更新日期:1984-06-01 00:00:00
abstract::The case is reported of a 41 year old white woman who developed systemic lupus erythematosus (SLE) seven years after primary Sjögren's syndrome and four years after the association of Sjögren's syndrome with Jaccoud's arthritis. The SLE was detected by a benign intracranial hypertension, which is a rare neuro-ophthalm...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.51.6.808
更新日期:1992-06-01 00:00:00
abstract::Recent data are presented which indicate a critical role for interleukin (IL)-18 in rheumatoid arthritis (RA). The T cells and macrophages invading the synovium or in the synovial fluid are the chief cellular targets of IL-18 in RA. Neutrophils, dendritic cells and endothelial cells may also be cellular mediators of I...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,评审
doi:10.1136/ard.2006.067793
更新日期:2007-11-01 00:00:00
abstract:OBJECTIVES:IKZF1 and IKZF3 (encoding transcription factors Ikaros and Aiolos) are susceptibility loci for systemic lupus erythematosus (SLE). The pharmacology of iberdomide (CC-220), a cereblon (CRBN) modulator targeting Ikaros and Aiolos, was studied in SLE patient cells and in a phase 1 healthy volunteer study. METH...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,随机对照试验
doi:10.1136/annrheumdis-2017-212916
更新日期:2018-10-01 00:00:00
abstract::Platelet serotonin concentrations were measured in 43 patients with systemic sclerosis, in 11 patients with primary Raynaud's phenomenon, and in 38 normal controls. Patients with the CREST variant (calcinosis, Raynaud's phenomenon, oesophageal dysmotility, sclerodactyly, telangiectasia) had significantly lower platele...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.48.7.586
更新日期:1989-07-01 00:00:00
abstract::Volatile short-chain fatty acids (SCFA) in synovial fluid from 80 patients were quantified by gas-liquid chromatography (GLC). Characteristic patterns of volatile SCFA could not be associated with septic, nonseptic inflammatory, or noninflammatory groups. Mean concentrations of pentanoic and hexanoic acids were simila...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.42.4.362
更新日期:1983-08-01 00:00:00
abstract::Biological therapies directed at proinflammatory cytokines have irrevocably changed the landscape of treatment of rheumatoid arthritis (RA) and other autoimmune diseases. With the advances in our knowledge in cytokine signalling, the question emerges whether targeting intracellular signalling might also be a safe and ...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,评审
doi:10.1136/annrheumdis-2012-202576
更新日期:2013-04-01 00:00:00
abstract:OBJECTIVE:To review the presentation and clinical findings of arthritis associated with hidradenitis suppurativa. METHOD:Medical records from the rheumatology clinics of two major teaching hospitals were reviewed for arthritis and hidradenitis suppurativa. The nine patient records fulfilling these criteria were review...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.53.1.64
更新日期:1994-01-01 00:00:00
abstract::Chondromalacia patellae is difficult to diagnosis clinically with accuracy. In order to clarify the relevant symptoms and signs, 78 patients presenting with a clinical diagnosis of chondromalacia were examined by arthroscopy. In 49% of the knees no abnormalities were found. Presenting symptoms were similar in the norm...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.37.6.540
更新日期:1978-12-01 00:00:00
abstract:OBJECTIVE:To study the correlation between ankle and knee cartilage morphology to test the hypothesis that knee joint cartilage loss in gonarthritis can be estimated retrospectively using quantitative MRI analysis of the knee and ankle and established regression equations; and to test the hypothesis that sex difference...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.2003.018226
更新日期:2004-11-01 00:00:00
abstract:BACKGROUND:Despite the importance of timely management of patients with inflammatory arthritis (IA), delays exist in its diagnosis and treatment. OBJECTIVE:To perform a systematic literature review to identify strategies addressing these delays to inform an American College of Rheumatology (ACR)/European League Agains...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,评审
doi:10.1136/annrheumdis-2011-201063
更新日期:2013-01-01 00:00:00
abstract::We report two patients with systemic lupus erythematosus who subsequently developed thrombotic thrombocytopenic purpura. In each case the coexistence of these two conditions was confirmed by pathological findings. Both patients responded to treatment, but one eventually died. A review of the literature suggests a poss...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.45.4.319
更新日期:1986-04-01 00:00:00
abstract:BACKGROUND:Treatment of juvenile idiopathic arthritis (JIA) has changed dramatically since the introduction of biological agents in 1999. OBJECTIVE:To evaluate trends in prescription patterns of biological agents and the subsequent outcome of JIA. METHODS:The Arthritis and Biologics in Children register (multicentre ...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,多中心研究
doi:10.1136/annrheumdis-2013-204641
更新日期:2015-07-01 00:00:00
abstract:OBJECTIVE:To carry out a prospective two year follow up study comparing conventional radiography, three-phase bone scintigraphy, ultrasonography (US), and three dimensional (3D) magnetic resonance imaging (MRI) with precontrast and dynamic postcontrast examination in detecting early arthritis. The aim of the follow up ...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.61.10.895
更新日期:2002-10-01 00:00:00
abstract:BACKGROUND:Population mean changes from clinical trials are difficult to apply to individuals in clinical practice. Responder analysis may be better, but needs validating for level of response and treatment duration. METHODS:The numbers of patients with pain relief over baseline (> or =15%, > or =30%, > or =50%, > or ...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章,meta分析
doi:10.1136/ard.2009.107805
更新日期:2010-02-01 00:00:00
abstract::Three hundred and twenty-one synovial fluids from the knees of patients with six different inflammatory arthropathies have been examined for the presence of cytophagocytic monocytes (CPM) and mast cells. Both cell types were seen independently in many of the fluids examined but were found together only in those patien...
journal_title:Annals of the rheumatic diseases
pub_type: 杂志文章
doi:10.1136/ard.44.5.312
更新日期:1985-05-01 00:00:00