The Knee Society Short Form Reduces Respondent Burden in the Assessment of Patient-reported Outcomes
Giles R. Scuderi,Alla Sikorskii,Robert B. Bourne,Jess H. Lonner,James B. Benjamin,Philip C. Noble +5 more
TLDR
The short-form version of the Knee Society Knee Score was found to be practical, valid, reliable, and responsive for assessing the functional outcome of TKA and is expected to improve the rate of patient completion while also being easier to administer.Abstract:
The patient’s own evaluation of function and satisfaction is a fundamental component of assessing outcomes after total knee arthroplasty (TKA). The new Knee Society Knee Score was introduced in 2012 and has been shown to be a valid and reliable instrument for measuring the outcome of TKA. This score combines an objective, physician-derived component and a patient-reported component to characterize the expectations, satisfaction, and functional activities of diverse lifestyles of contemporary patients undergoing TKA. However, in the routine clinical setting, the administration and scoring of outcome measures is often resource-intensive, as the expenditure of time and budget for outcome measurement increase with the length and complexity of the instrument used, and so a short-form assessment can help to reduce the burden the assessment of outcomes. The purposes of this study were (1) to develop a short-form version of the new Knee Society Knee Score; (2) to validate the short form against the full Knee Society Knee Score; and (3) to evaluate the responsiveness to treatment (TKA) of the new Knee Society short-form assessment. To develop the short form, data from the sample of 497 patients recruited during validation of the original long form the new Knee Society Knee Score were used. The multicenter study was approved by the institutional review boards at 15 participating medical institutions within the United States and Canada. An analytic item reduction approach was applied simultaneously but separately to preoperative and postoperative patient-reported data to select a subset of items from the original form that had good measurement properties and closely reflected the scores obtained using the original form. Expectations and satisfaction were reflected by a single item in the newly developed short form compared with a total of five satisfaction and three expectation items in the long form. The functional activities subscale was reduced from 17 to six items. An excellent correlation was demonstrated between function scores derived from the functional activities subscale of the original long-form score (17 items) and the six-item short form (r = 0.97; p < 0.01). The sample mean difference between the two scores was less than 4 points with a SD of 6.7 points. The short form was capable of discriminating clinically different groups of patients before and after TKA with virtually the same estimated effect size as the original functional activities subscale of the new Knee Society Knee Score. The Knee Society Knee Score long form is still recommended for research studies and for more sensitive measurement of the outcomes of individual patients. However, for general clinical use with large patient populations, the short form is expected to improve the rate of patient completion while also being easier to administer. In this study, we found the short-form version of the Knee Society Knee Score to be practical, valid, reliable, and responsive for assessing the functional outcome of TKA.read more
Citations
More filters
Journal ArticleDOI
Human bone marrow mesenchymal stem cell injection in subchondral lesions of knee osteoarthritis: a prospective randomized study versus contralateral arthroplasty at a mean fifteen year follow-up
TL;DR: This study showed that subchondral bone marrow concentrate (as compared with TKA) had a sufficient effect on pain to postpone or avoid the TKA in the contra lateral joint of patients with bilateral osteoarthritis.
Journal ArticleDOI
Subchondral bone or intra-articular injection of bone marrow concentrate mesenchymal stem cells in bilateral knee osteoarthritis: what better postpone knee arthroplasty at fifteen years? A randomized study.
Philippe Hernigou,Charlie Bouthors,Claire Bastard,Charles Henri Flouzat Lachaniette,Hélène Rouard,Arnaud Dubory +5 more
TL;DR: Implantation of MSCs in the subchondral bone of an osteoarthritic knee is more effective to postpone TKA than injection of the same intra-articular dose in the contralateral knee with the same grade of osteoarchritis.
Journal ArticleDOI
Validity and Internal Consistency of the New Knee Society Knee Scoring System
TL;DR: The KSS was validated using a separate sample of patients undergoing primary TKA to evaluate the internal consistency and correlation coefficients between KSS symptoms, functional activities, and satisfaction scores and scores on the KOOS pain subscale supported validity.
Journal ArticleDOI
Modern Day Bicruciate-Retaining Total Knee Arthroplasty: A Short-Term Review of 146 Knees
TL;DR: This is the largest consecutive series of BCR total knee arthroplasties using the modern-day implant design with 1-year follow-up in the United States and shows great patient-reported satisfaction, function, and short-term outcomes for patients implanted with the new BCR design.
Journal ArticleDOI
Are Midterm Patient-Reported Outcome Measures Between Rotating-Platform Mobile-Bearing Prosthesis and Medial-Pivot Prosthesis Different? A Minimum of 5-Year Follow-Up Study
TL;DR: Although both prostheses provided comparable PROMs, patients with an RP prosthesis were more satisfied than those with an MP prosthesis for highly demanding activities that are strongly associated with the presence of postoperative FC.
References
More filters
Book
Statistical Power Analysis for the Behavioral Sciences
TL;DR: The concepts of power analysis are discussed in this paper, where Chi-square Tests for Goodness of Fit and Contingency Tables, t-Test for Means, and Sign Test are used.
Journal ArticleDOI
A 12-Item Short-Form Health Survey: Construction of Scales and Preliminary Tests of Reliability and Validity
TL;DR: Twenty cross-sectional and longitudinal tests of empirical validity previously published for the 36-item short-form scales and summary measures were replicated for the 12-item Physical Component Summary and the12-item Mental Component Summary, including comparisons between patient groups known to differ or to change in terms of the presence and seriousness of physical and mental conditions.
Journal ArticleDOI
Multiple imputation for missing data in epidemiological and clinical research: potential and pitfalls.
Jonathan A C Sterne,Ian R. White,John B. Carlin,Michael Spratt,Patrick Royston,Michael G. Kenward,Angela M. Wood,James R. Carpenter +7 more
TL;DR: The appropriate use and reporting of the multiple imputation approach to dealing with missing data is described by Jonathan Sterne and colleagues.