Can Original Knee Society Scores Be Used to Estimate New 2011 Knee Society Scores?

Odum, Susan M.; Fehring, Thomas K.

doi:10.1007/s11999-016-4886-0

Cited by 22 publications

(15 citation statements)

References 16 publications

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“…A few studies have developed crosswalk tables to link various PROMs for orthopaedic patients. [32][33][34][35] In this study, we linked the KOOS-PS instrument with the PROMIS-PF 10a: although the KOOS-PS is a joint-specific measure and the PROMIS-PF 10a is a universal measure, both instruments mainly measure respondents' ability to function in everyday life.…”

Section: Discussionmentioning

confidence: 99%

Linking the KOOS-PS to PROMIS Physical Function in Knee Patients Evaluated for Surgery

Tang

Schalet

Heng

et al. 2022

J Am Acad Orthop Surg

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Introduction:The Knee Injury and Osteoarthritis Outcome Score-Physical Function Short-form and the Patient-Reported Outcomes Measurement Information System Physical Function are widely used patient-reported outcome measures in orthopaedic practice and research. It would be helpful for clinicians and researchers to compare scores obtained on one instrument with those collected on another. To achieve this goal, this study conducted a linking analysis and computed a crosswalk table between these two scales. Data: The data of this study were collected as part of the clinical care of total knee arthroplasty patients in a large urban and suburban health system. The sample was a mix of responses from nonsurgical (no surgery performed), preoperative (before surgical intervention), and postoperative (after surgical intervention) groups. Methods: This study applied five linking methods: the item response theory (IRT)-based linking methods including fixed-parameter calibration, separate-parameter calibration with Stocking-Lord constants, and calibrated projection; and the equipercentile methods with log-linear smoothing and nonsmoothing approaches. Before conducting the linking analysis, we checked the linking assumptions including the similar content of the two scales, the unidimensionality of the combined scales, and the population invariance. The results of the five linking methods were evaluated by mean difference, SD, root-mean-squared deviation, intraclass correlation coefficient of the observed T scores and the crosswalkderived T scores. Results: The linking assumptions were all met. T scores generated from the Stocking-Lord crosswalk had the smallest mean difference (= 20.03) and relatively small SD (= 4.91) and root-mean-squared deviation (= 4.91) among the five linking methods. We validated this crosswalk in a larger sample with the nonsurgical, preoperative, and postoperative groups and in an external sample.

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Section: Discussionmentioning

confidence: 99%

Linking the KOOS-PS to PROMIS Physical Function in Knee Patients Evaluated for Surgery

Tang

Schalet

Heng

et al. 2022

J Am Acad Orthop Surg

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“…All patients were contacted via telephone and provided a self-administered survey including current weight, occurrence of a major postoperative complication, and either the Harris Hip Score (HHS) [6] or the pain and function aspects of the Knee Society Score (KSS) [7]. The original score described by Insall was used for its conciseness and high correlation to the most updated KSS [8]. If patients chose not to participate in the self-administered survey, chart review via "Care Everywhere" (Epic Systems Corporation, Verona, WI) was investigated for follow-up at another center that uses the Epic electronic health records system globally.…”

Section: Methodsmentioning

confidence: 99%

Fate of the Morbidly Obese Patient Who Is Denied Total Joint Arthroplasty

Shapiro

Narayanan

Taylor

et al. 2020

The Journal of Arthroplasty

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Background: The purpose of this study is to investigate outcomes of patients denied total hip (THA) or knee arthroplasty (TKA) due to morbid obesity. Methods: We performed an observational study of patients denied arthroplasty due to morbid obesity. A survey including the Harris Hip Score or pain and function components of the original Knee Society Score (KSS) was conducted with minimum 2-year follow-up. Statistical analysis was performed with parametric testing with significance at P < .05. Results: In total, 125 (4.4%) of 2819 patients were denied THA or TKA due to morbid obesity. Twenty-four (19.2%) met target weight and underwent arthroplasty at our institution. Of the remaining 101 (80.8%) patients, 33 (32.7%) agreed to participate in the survey. None received THA and 6 received TKA elsewhere above target body mass index. Harris Hip Score was significantly higher in the successful weight loss cohort at our institution (70.5 ± 13.4 vs 34.6 ± 13.1). KSS Pain (maximum score of 50) and Function (maximum score of 100) were significantly higher in the successful weight loss cohort at our institution (32.9 ± 16.5; 51.1 ± 19.5) compared to the denied nonoperative cohort (7.2 ± 11.5; 33.0 ± 23.1); however, only KSS Pain was higher when compared to the TKA elsewhere cohort (14.2 ± 18.0; 29.2 ± 38.7). KSS Pain and Function were similar for both denial cohorts regardless of undergoing arthroplasty. Conclusion: Nearly 80% of patients denied never met target weight for arthroplasty. Those who met target weight prior to arthroplasty often reported better outcomes. Outcomes were similar when target weight was not met regardless of undergoing arthroplasty.

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“…The KSS, a joint-specific outcome, is divided into 2 parts (i.e., the KS-KS and KS-FS) and helps exclude knee deterioration due simply to natural aging ( 26 ). KSS is a validated scoring systems to reflect the functional ability of the joints.…”

Section: Methodsmentioning

confidence: 99%

Effect of body mass index on postoperative mechanical alignment and long-term outcomes after total knee arthroplasty: a retrospective cohort study of 671 knees

Lai¹,

Cao²,

Li³

et al. 2022

Ann Transl Med

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Background: A high body mass index (BMI) is associated with increased rates of complications after total knee arthroplasty (TKA). However, no study has examined the effect of BMI on lower limb alignment using the World Health Organization's (WHO) BMI classification. We believe that the WHO's BMI classification allows a uniform standard worldwide. We sought to investigate the potential association between a high BMI and the incidence of postoperative misalignment. We also evaluated whether a higher BMI is associated with worse clinical function. Methods:We retrospectively reviewed the data of 671 patients who underwent primary TKA for varus osteoarthritis between January 2010 and December 2015. The patients were divided into the following 5 groups based on their BMI: normal weight (<25.0 kg/m 2 ), overweight (25.0-29.9 kg/m 2 ), class I obese (30.0-34.9 kg/m 2 ), class II obese (35-39.9 kg/m 2 ), and class III obese (>40 kg/m 2 ). Both weight and height were measured by nurses on admission. Patients' preoperative HKA, gender, age, and side of surgery were collected as baseline. All the patients underwent standing, weight-bearing, full-length radiography before and after surgery to measure the mechanical hip-knee-ankle angle (HKA). We followed up patients by telephone.Among the BMI subgroups, we compared the knee function scores, including the Western Ontario andMcMaster Universities Osteoarthritis Index (WOMAC) score, Knee Society-Knee Score (KS-KS), Knee Society-Function Score (KS-FS), Forgotten Joint Score (FJS), and range of motion (ROM). A multivariate linear regression analysis and a logistic regression was conducted to examine the outcomes. Results:The study had a mean follow-up period of 8.16 years. The multivariate and logistic regression analyses revealed that preoperative alignment (P=0.002) and a higher BMI (P=0.015) were associated with a higher risk of postoperative misalignment. The WOMAC scores were higher in the normal and overweight groups than the other groups (P=0.022). The FJS and KS-KS gradually decreased as BMI increased.Conclusions: A higher BMI is associated with a greater risk of misalignment and worse long-term clinical outcome after TKA. When treating patients with high BMI, we should pay more attention to the adjustment of lower limb alignment intraoperatively.

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Can Original Knee Society Scores Be Used to Estimate New 2011 Knee Society Scores?

Cited by 22 publications

References 16 publications

Linking the KOOS-PS to PROMIS Physical Function in Knee Patients Evaluated for Surgery

Linking the KOOS-PS to PROMIS Physical Function in Knee Patients Evaluated for Surgery

Fate of the Morbidly Obese Patient Who Is Denied Total Joint Arthroplasty

Effect of body mass index on postoperative mechanical alignment and long-term outcomes after total knee arthroplasty: a retrospective cohort study of 671 knees

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