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OBJECTIVE To give an overview of the literature on knee proprioception in knee osteoarthritis (OA) patients. METHOD A literature search was performed and reviewed using the narrative approach. RESULTS (1) Three presumed functions of knee proprioception have been described in the literature: protection against excessive movements, stabilization during(More)
OBJECTIVE To improve a self-administered questionnaire that includes 42 dichotomous items and measures activity limitations in rising and sitting down (R&S) in patients with lower-extremity disorders who live at home. DESIGN Cross-sectional study. SETTING Outpatient clinics of secondary and tertiary care centers. PARTICIPANTS Patients (N=759; 47% men;(More)
BACKGROUND A wide variety of cognitive concepts have been shown to play an important role in chronic widespread pain (CWP). Although these concepts are generally considered to be distinct entities, some might in fact be highly overlapping. The objectives of this study were to (i) to establish inter-relationships between self-efficacy, cognitive coping(More)
BACKGROUND This study investigates the usefulness of the nonparametric monotone homogeneity model for evaluating and constructing Health-Related Quality-of-Life Scales consisting of polytomous items, and compares it to the often-used parametric graded response model. METHODS The nonparametric monotone homogeneity model is a general model of which all(More)
OBJECTIVE To develop a hierarchical scale that measures activity limitations in climbing stairs in patients with lower-extremity disorders living at home. DESIGN Cross-sectional study with Mokken scale analysis of 15 dichotomous items. SETTING Outpatient clinics of secondary and tertiary care centers. PARTICIPANTS Patients (N=759; mean age +/-(More)
OBJECTIVE To determine whether muscle strength, proprioceptive accuracy, and laxity are associated with self-reported knee instability in a large cohort of knee osteoarthritis (OA) patients, and to investigate whether muscle strength may compensate for impairment in proprioceptive accuracy or laxity, in order to maintain knee stability. METHODS Data from(More)
OBJECTIVE To describe the osteoarthritis study population of CHECK (Cohort Hip and Cohort Knee) in comparison with relevant selections of the study population of the Osteoarthritis Initiative (OAI) based on clinical status and radiographic parameters. METHODS In The Netherlands a prospective 10-year follow-up study was initiated by the Dutch Arthritis(More)
BACKGROUND The Action Research Arm (ARA) test is a performance test of upper extremity motor function which consists of 19 items divided into four hierarchical subtests. This multidimensionality has not yet been tested empirically. OBJECTIVE To investigate the dimensionality of the ARA test. DESIGN Cross-sectional study involving a sample of 63 chronic(More)
OBJECTIVE To identify subgroups or phenotypes of knee osteoarthritis (OA) patients based on similarities of clinically relevant patient characteristics, and to compare clinical outcomes of these phenotypes. METHODS Data from 842 knee OA patients of the Osteoarthritis Initiative were used. A cluster analysis method was performed, in which clusters were(More)
OBJECTIVE To investigate whether an exercise program, initially focusing on knee stabilization and subsequently on muscle strength and performance of daily activities is more effective than an exercise program focusing on muscle strength and performance of daily activities only, in reducing activity limitations in patients with knee osteoarthritis (OA) and(More)