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BACKGROUND Cross cultural validity is of vital importance for international comparisons. OBJECTIVE To investigate the validity of international Dutch-English comparisons when using the Dutch translation of the Western Ontario and McMaster Universities osteoarthritis index (WOMAC). PATIENTS AND METHODS The dimensionality, reliability, construct validity,(More)
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 develop a hierarchical scale that measures activity limitations in walking in patients with lower-extremity disorders who live at home. DESIGN Cross-sectional study. SETTING Orthopedic workshops and outpatient clinics of secondary and tertiary care centers. PARTICIPANTS Patients (N=981; mean age +/- standard deviation, 58.6+/-15.4 y; 46%(More)
OBJECTIVE To assess the test-retest reliability of two questionnaires for measuring activity limitations in patients with Complex Regional Pain Syndrome type 1 (CRPS I) of the lower extremity. DESIGN Patients filled out the Walking Stairs Questionnaire and the Questionnaire Rising and Sitting Down twice during a one-week period. SETTING Outpatient pain(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)
OBJECTIVE To establish the responsiveness of observational and self-report methods for the assessment of disability in mobility in patients with osteoarthritis (OA). METHODS Data from 186 patients with hip OA or knee OA were used. Data from 1 observational method and 4 self-report methods for the assessment of disability in mobility were collected at week(More)
BACKGROUND Pain-related avoidance of activities is hypothesized to lead to lower muscle strength and thereby activity limitations. Negative affect (e.g., low vitality, depression) is thought to strengthen the tendency to avoid activities. PURPOSE The aim of this study was to assess the validity of this "avoidance model" in patients with early symptomatic(More)
OBJECTIVES Knee osteoarthritis (OA) is a leading cause of activity limitations. The knee OA population is likely to consist of subgroups. The aim of the present study was to identify homogeneous subgroups with distinct trajectories of activity limitations in patients with early symptomatic knee OA and to describe characteristics of these subgroups. (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 The Patient-Reported Outcomes Measurement Information System (PROMIS(®)) is a new, state-of-the-art assessment system for measuring patient-reported health and well-being of adults and children that has the potential to be more valid, reliable and responsive than existing PROMs. The PROMIS items can be administered in short forms or, more(More)