Validation of the Questionnaire to Identify Knee Symptoms (QuIKS) using Rasch analysis

Health and Quality of Life Outcomes

Research

Mark Speechley¹  Robert J. Petrella²  J. Robert Giffin³  Jessica M. Clark⁴  Clayon B. Hamilton⁵  Monica R. Maly⁶  Bert M. Chesworth⁷ 

[1] Department of Epidemiology and Biostatistics, Schulich School of Medicine & Dentistry; Schulich Interfaculty Program in Public Health, Western University, London, ON, Canada;Department of Family Medicine, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada;Department of Surgery, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada;Department of Surgery, University of Alberta, Edmonton, AB, Canada;Graduate Program in Health and Rehabilitation Sciences, Western University, London, ON, Canada;Institute for Applied Health Sciences, McMaster University, Hamilton, ON, Canada;School of Physical Therapy and Department of Epidemiology and Biostatistics, Schulich School of Medicine & Dentistry, Western University, N6G1H1, London, ON, Canada;

关键词: Outcome assessment;    Knee osteoarthritis;    Questionnaire;    Reliability and validity;    Knee pain;    Lived experience;   

DOI  :  10.1186/s12955-015-0358-6

 received in 2015-06-17, accepted in 2015-09-18,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundThe Questionnaire to Identify Knee Symptoms (QuIKS) was recently developed to promote activity by screening for experiences related to early symptoms in people with emergent chronic knee pain problems, such as osteoarthritis (OA) – like knee pain. The main purpose of the current study was to evaluate measurement properties of the QuIKS using Rasch analysis in a sample of people with knee symptoms consistent with symptomatic knee OA.MethodThis study used cross-sectional data. The sample was 200 subjects along the following knee health continuum: pain-free healthy knees (n = 55) from a university community, knee pain with no knee OA diagnosis (n = 111) from a university-affiliated medical clinic, and patients with surgeon-diagnosed symptomatic knee OA awaiting high tibial osteotomy (n = 34) from a sports medicine surgical clinic. The 13-item QuIKS was evaluated for its factor structure, item- and person-fit, item’s category response structure, differential item functioning by sex and obesity status, local item dependency, unidimensionality, and test precision. Subsequently, the QuIKS underwent known-groups analysis and convergent validity with the Knee injury and Osteoarthritis Outcome Score (KOOS).ResultsIn the QuIKS, each item’s category response structure was modified. No differential item functioning was observed. Local item dependency informed the formation of four testlets. This refined QuIKS obtained summary fit to the Rasch measurement model, unidimensionality, reliability (person separation index = 0.82), and interval-level scoring. Subsequently, the Rasch-validated QuIKS (QuIKS-R) demonstrated excellent known-groups validity and good convergent validity with the KOOS (Spearman’s rho = 0.45 to 0.77).ConclusionsThe QuIKS-R provides interval-level quantification of knee symptoms-related experiences in people with knee symptoms consistent with symptomatic knee OA. Its scores might be useful for clinicians for promoting activity in individuals with early symptoms consistent with symptomatic knee OA.

【 授权许可】

CC BY   
© Hamilton et al. 2015