The reliability of the American Knee Society Score

Liow, R. Y. L.; Walker, Karen; Wajid, Mohammad A; Bedi, Gurinder; Lennox, Catherine M E

doi:10.1080/000164700317362244

Cited by 111 publications

(68 citation statements)

References 14 publications

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“…We used a virtual knee simulator (LifeMOD TM /Knee-SIM; LifeModeler, Inc, San Clemente, CA, USA), based on multibody dynamics, to simulate a lunge in a manner similar to the in vivo lunge maneuver reported in fluoroscopic studies of TKA kinematics [9][10][11][12]19]. The model included tibiofemoral and patellofemoral contact, passive soft tissue (medial and lateral collateral ligaments, PCL, and capsular tissues), and active muscle elements (quadriceps and hamstrings).…”

Section: Methodsmentioning

confidence: 99%

“…The Knee Society Function Scores [12], while a good tool for an overall measure of how well a patient returns to activities of daily living, is not a good tool for differentiating surgical technique parameters, such as deviation from the mechanical axis or rotational alignment of implant, during surgery. Recently, investigators have utilized fluoroscopic analysis to study in vivo TKA kinematics to further describe motion and the functional parameters of TKA postoperatively [9-11, 14, 19].…”

Section: Introductionmentioning

confidence: 99%

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How Does TKA Kinematics Vary With Transverse Plane Alignment Changes in a Contemporary Implant?

Mihalko

Conner

Benner

et al. 2012

Clinical Orthopaedics &Amp; Related Research

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Background Assessment of patient function after TKA often focuses on implant alignment and daily activity capabilities, but the functional results and kinematics of the TKA are not easily predicted by some of these parameters during surgery. Questions/purposes We asked whether differences in implant alignment in the transverse plane may affect fluorokinematics and be one of the many variables that help explain the discrepancies in fluorokinematic results. Methods We utilized a computer model (LifeMOD TM / KneeSIM; LifeModeler, Inc, San Clemente, CA, USA) to show variability in polyethylene contact patterns. We imported components of a cruciate-retaining TKA into the model and subjected the systems to a simulated lunge. We modeled five different combinations of implant positioning in the transverse plane of both the femoral and tibial components in internal or external rotation and compared the resulting changes in joint rotations and displacements of these five variations to those for published fluorokinematic observations using the same modeled lunge-type maneuver for five patients. Results We observed variations in AP translation of the lateral and medial femoral condyles resembling several of those in the literature for individual patients with the same cruciate-retaining knee implant. The largest AP translational changes were seen with the tibia internally rotated 5°. Using the five different implant transverse plane alignment scenarios resulted in a coefficient of determination of 0.6 for the linear regression when compared to five subjects from a published fluorokinematic study. Conclusions Variations in implant positioning may be responsible for variations in fluorokinematics reported for individual subjects with the same implant design. Clinical Relevance If validated computer modeling can aid surgeons to predict the effects of individual implant alignment variations in TKA kinematics, a more personalized approach to implant positioning during TKA can be implemented.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

How Does TKA Kinematics Vary With Transverse Plane Alignment Changes in a Contemporary Implant?

Mihalko

Conner

Benner

et al. 2012

Clinical Orthopaedics &Amp; Related Research

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“…The visual analog scale (VAS) for pain, Oxford knee score [3], Knee Society score (KSS) [6,12,13], and SF-36 [14,15] were administered concurrently to validate the KKS. To assess test-retest reliability, the KKS and VAS for pain were again administered 1 to 4 weeks later.…”

Section: Methodsmentioning

confidence: 99%

Development and Validation of a New Evaluation System for Patients With a Floor-based Lifestyle: The Korean Knee Score

Kim

et al. 2013

Clinical Orthopaedics &Amp; Related Research

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Background Patients' perspectives on functioning and health have been increasingly recognized as a crucial aspect of health care, leading to the use of patient-reported instruments for outcome assessment. However, available instruments for total knee arthroplasty do not reflect the floor-based lifestyle with high knee flexion of eastern Asia. Questions/purposes We therefore (1) describe a novel patient-generated knee evaluation instrument, the Korean knee score (KKS), to reflect floor-based lifestyles with high knee flexion that included questions regarding health-related quality of life; (2) determined the reliability of the questionnaire; and (3) performed limited validation studies. Methods The KKS was developed by a committee of 10 experts from 10 institutes nationwide. The development procedure comprised a development phase for generation of the questionnaire and a testing phase for assessment of measurement properties: reliability, validity, and responsiveness. A total of 634 patients participated in this test survey. Results The KKS exhibited an intraclass correlation coefficient of 0.931 and internal consistency (Cronbach's a = 0.973). The absence of a ceiling or floor effect suggested content validity. The correlation coefficient with Knee Society score (knee score, function score) and Oxford knee score was 0.599, 0.690, and 0.871, respectively, suggesting construct validity. Correlation with concurrent measures of physical function from the SF-36 ranged from 0.549 to 0.719 and those of mental function from 0.407 to 0.428. Responsiveness was evident with a standardized response mean of 0.74. Conclusions The KKS is a reliable and responsive instrument for assessing osteoarthritis. The limited validation studies suggest it is an appropriate evaluation instrument for patients with osteoarthritis and a floor-based lifestyle.

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“…A Knee Society rating system score of 100 represents unlimited walking distance and normal stair-climbing without the use of a walking aid. The clinical examination score focuses on knee motion, stability, alignment of the knee, and pain 28,29 . This score is composed of 100 points, including 50 points allocated for the evaluation of motion, stability, and alignment and 50 points allocated for pain.…”

mentioning

confidence: 99%

Limitations of the Knee Society Score in Evaluating Outcomes Following Revision Total Knee Arthroplasty

Ghanem

Pawasarat

Lindsay

et al. 2010

The Journal of Bone and Joint Surgery-American Volume

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The reliability of the American Knee Society Score

Cited by 111 publications

References 14 publications

How Does TKA Kinematics Vary With Transverse Plane Alignment Changes in a Contemporary Implant?

How Does TKA Kinematics Vary With Transverse Plane Alignment Changes in a Contemporary Implant?

Development and Validation of a New Evaluation System for Patients With a Floor-based Lifestyle: The Korean Knee Score

Limitations of the Knee Society Score in Evaluating Outcomes Following Revision Total Knee Arthroplasty

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