Reproducibility and validity of the DynaPort KneeTest (original) (raw)
Related papers
Knee Surgery, Sports Traumatology, Arthroscopy, 2017
Outcome Score-Physical Function Short Form, pain during activity score and knee extensor strength were used as comparator instruments. Measurements were obtained at baseline and 12 months after TKA. Results Appropriate test-retest reliability was found for all three tests. Intraclass correlation coefficient (ICC) for the 30-s CST was 0.90 (95% CI 0.68; 0.96), 40 m FPWT 0.93 (0.85; 0.96) and for the 10-step stair climb test (10-step SCT) 0.94 (0.89; 0.97). Adequate construct validity could not be confirmed for the three tests. For the 30-s CST, 42% of the predefined hypotheses were confirmed; for the 40 m FPWT, 27% and for the 10-step SCT 36% were confirmed. The 40 m FPWT was found to be responsive with 75% of predefined hypothesis confirmed, whereas the responsiveness for the other tests could not be confirmed. For the
Clinimetric quality of the new 2011 Knee Society Score: High validity, low completion rate
The Knee, 2014
Background: The demands of the younger and more active current total knee arthroplasty (TKA) patients are not in line with the current outcome assessments. Therefore, new questionnaires are developed or adjusted, as with the popular 1989 Knee Society Score (KSS). This study is the first to investigate the clinimetric parameters of the patient-reported outcome measurement (PROM) part of the 2011 KSS. Methods: Four-hundred-fifteen primary Dutch TKA patients were scored using the PROM part of the 2011 KSS. The scale is subdivided into an Objective (not evaluated), Satisfaction, Expectation and Function subscales. Clinimetric quality was evaluated by response and completion rate, test-retest reliability (n = 29, intraclass correlation coefficient), internal consistency (n = 172, Cronbach's alpha), construct validity (Pearson's correlations with 1989 KSS (n = 75) and KOOS-PS (n = 139)) and responsiveness (n = 20, paired-samples t-test, effect sizes and floor and ceiling effects). Results: A response rate of 96% and completion rate of 43% were found. Reliability and internal consistency proved excellent with ICCs ≥ 0.79 and Cronbach's alpha ≥ 0.76 for all subscales. Strong correlations were found between the Function subscales of the 2011 KSS and KOOS-PS (r = −0.60 to −0.83). All subscales improved significantly after intervention, with exception of Walking & Standing and Discretionary Activities. 23% reached the maximum score postoperatively in Walking & Standing, indicating a ceiling effect. Conclusions: The 2011 KSS is a reliable, internal consistent, construct valid and responsive questionnaire to assess the outcome of the Dutch TKA patients. Optimizations (e.g. shortening the scale, simplified design) are recommended to increase the disappointing completion rate. Clinical relevance: The 2011 KSS is a reliable, internal consistent, construct valid and responsive questionnaire to assess the outcome of the Dutch TKA patients.
Functional outcome of knee arthroplasty is dependent upon the evaluation method employed
European Journal of Orthopaedic Surgery & Traumatology, 2009
It is becoming increasingly important to evaluate surgical procedures beyond pain relief and implant survival. Patient satisfaction and objective functional assessment is now as relevant. The aim of this study was to establish the functional differences and patient perceptions between unicompartmental knee replacement (UKR) and total knee replacement (TKR). In a prospective study 52 TKR patients were compared to 24 UKR (at preoperative, 3, 6 months and 1 year postoperative). The disease specific KSS and Womac (pain and function subscores), the generic SF36 (pain, function and patient perception subscores) and the Dynaport Ò Knee Test, a validated performance-based knee test using accelerometers to score function during activities of daily living, was utilized. Preoperative UKR patients had significantly higher KSS function and the Dynaport Ò Knee Test (P \ 0.05), but despite being younger, with different indication, they were not different to TKR with regards to function and pain subscores of Womac and SF36. Regarding preoperative perception, UKR patients reported better physical and social function but subjectively felt worse than TKR patients regarding health, emotion and mental status (n.s.). At one year, postoperative perception scores for both groups increased significantly, with UKR retaining functional lead and UKR patients also felt superior regarding health, emotion and mental status (n.s.). Postoperative recovery regarding KSS, Womac, and SF36-pain was steep only during the first 3 months with near equal values for both TKR and UKR. It was found that SF36-Function recovery was not significant, but UKR also scored higher than TKR. Only functional scores by the Dynaport Ò Knee Test showed continued improvement and maintained the functional advantage of UKR patients throughout recovery. UKR and TKR patients have different age demographics, indications and perceptions, but clinical outcome scores do not equally capture these differences, especially with regards to function. Postoperative functional benefits of UKR seem to be due mainly to the superior preoperative conditions. Appreciation of recovery with generic, disease specific and functional measurements appears invaluable.
Osteoarthritis and Cartilage, 2002
Objective: To assess and compare the test-retest reliability and the construct validity of the Lequesne and the French-Canadian version of the WOMAC indexes. Design: Patients with symptomatic knee osteoarthritis (OA) fulfilling the revised criteria of the American College of Rheumatology completed both the Lequesne and the French-Canadian version of the WOMAC indexes twice at a 3-h interval. Impairment outcome measures, patients' perceived discomfort in walking and handicap were recorded. For both questionnaires, an analysis was performed item by item. Repeatability was assessed using the intraclass correlation coefficient (ICC) and the Bland and Altman method. Construct validity was investigated using the Spearman rank correlation coefficient and a factor analysis was performed. Results: 88 patients were included. Eight questions of the WOMAC section C and one question of the Lequesne index had insufficient psychometric properties. Although repeatability of questionnaires was fair to excellent (0.82, 0.68, 0.74, 0.95 for the WOMAC sections A, B, C and Lequesne index respectively), construct validity could not be demonstrated. Factor analysis of the WOMAC extracted five factors which differed from the a priori triple stratification. Factor analysis of the WOMAC section C extracted two factors explaining 71% of the variance which could not be clinically characterized. For the Lequesne index, expected convergent correlations were not always achieved. Three factors were extracted by factor analysis explaining 58% of the variance. Conclusion: Despite their good test-retest reliability, the two composite indexes evaluated are not valid to assess the concept of functional disability induced by knee OA in a French population.
International Journal of Health Sciences, 2019
Understanding the impact of evidence-based practice toward the rehabilitation of patients with knee osteoarthritis (PKOA) is possible with appropriate outcome measures. There is a definite need to summarize the available outcomes with reference to knee OA. This review summarizes the available outcome measures used in the diagnosis, prognosis, and rehabilitation of PKOA. Electronic searches of PubMed, Medline, CINAHL, PsycINFO, Google Scholar, and EBSCO were conducted using terms relating to outcome measures used in the diagnosis, prognosis, and rehabilitation of PKOA. Papers examining the relationship between psychosocial factors and pain and disability outcomes following physiotherapy were included. Two reviewers selected, appraised and extracted studies independently. The searched papers were classified under three classifications, radiological, arthroscopic, and functional knee OA outcome measures. 26 outcome measures used in the diagnosis, prognosis, and rehabilitation of PKOA w...
The Oxford Knee Score; problems and pitfalls
The Knee, 2005
The Oxford Knee Score is a self-completed patient based outcome score. We audited the outcome of total knee arthroplasty at our unit using the Oxford Knee Score. The hypothesis of this study is that the OKS can be easily and accurately completed by unassisted patients.
Rheumatology (Oxford, England), 2004
The aggregated locomotor function (ALF) score, a simple measure of observed locomotor function, using timed walking, stairs and transfers, was developed and evaluated for intra-tester reliability, criterion-related validity and responsiveness in a sample of patients with knee osteoarthritis. Patients with knee osteoarthritis (n = 214) were recruited for inclusion in a randomized controlled trial investigating two methods of exercise provision. Before treatment, patients completed the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) and Short Form 36 health survey (SF-36) questionnaires and were timed whilst performing an 8 m walk, ascending and descending a set of gymnasium stairs and completing a test of transferring in and out of a chair. A group of 15 patients also undertook a replicate test-retest reliability study of the above outcome measures. Standardized response means were calculated for the ALF, WOMAC and SF-36 from data from the clinical trial. The A...
The Malaysian Journal of Medical Science, 2020
Background: The proper reliability analysis for specific type of data and limit study of various types of construct validity are crucial for performance-based tests for the knee osteoarthritis (OA) population. The purpose of this study was to evaluate relative and absolute reliability and construct validity of the Osteoarthritis Research Society International (OARSI) recommended minimal core set of performance-based tests in knee OA in community-dwelling adults. Methods: Fifty-five primary knee OA (median age 69.0, interquartile range [IQR] 11.0) participated in the cross-sectional study. Three performance-based tests were performed in two sessions with a 1-week interval; 30-s chair stand test, 40-m fast-paced walk test and 9-step stair climb test. Relative reliability included intra-class correlation and Spearman's correlation coefficient (SPC). Absolute reliability included standard error of measurement, minimum detectable change, coefficient of variance, limit of agreement (LOA) and ratio LOA. Knee Injury and Osteoarthritis Outcome Score-Physical Function Short Form (KOOS-PS), knee extensor strength and pain scale were analysed for convergent validity using Pearson's correlation coefficient and SPC. Analysis of Covariance was utilised for known-groups validity. Results: Relative and absolute reliability were all acceptable. LOA showed small systematic bias. Acceptable construct validity was only found with knee extensor strength. All tests demonstrated known-groups validity with medium to large effect size. Conclusion: The OARSI minimum core set of performance-based tests demonstrated acceptable relative and absolute reliability and good known-groups validity but poor convergent validity.