Measuring functional abilities of patients with knee problems: rationale and construction of the DynaPort knee test (original) (raw)

2002, Knee Surgery, Sports Traumatology, Arthroscopy

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Reproducibility and validity of the DynaPort KneeTest

Arthritis & Rheumatism, 2005

Objective. To determine the reproducibility and validity of the DynaPort KneeTest, a performance-based test that measures quality of movement of patients undergoing total knee replacement (TKR). Methods. A total of 92 patients with osteoarthritis (OA) of the knee performed the KneeTest twice on the same day; 94 healthy controls performed the KneeTest once. During the test, 29 activities were performed with accelerometers attached to the body. Relevant functional parameters were extracted from the accelerometers. A selection of parameters was used to calculate activity scores, based on the ability of parameters to discriminate between patients and controls (regression analyses). Based on internal consistency analyses (Cronbach's ␣), redundant activities were removed. Four cluster scores and a total KneeScore were calculated from the remaining activity scores. Reproducibility and validity of the cluster scores and the total KneeScore 2 were assessed.

Construct validity of the DynaPort®KneeTest: a comparison with observations of physical therapists1

Osteoarthritis and Cartilage, 2005

Objective: To assess the construct validity of the DynaPort Ò KneeTest (KneeTest), which is a performance-based test to assess functioning of patients with knee osteoarthritis (OA). Scores on the KneeTest (KneeScore) were compared with observations of physical therapists of the patients' functional disability. The reliability of these observations was also assessed.

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