Sabine Goldhahn1, Ryohei Takeuchi2, Norimasa Nakamura3, Ryuichi Nakamura4, Takeshi Sawaguchi5. 1. AO Foundation, AO Clinical Investigation and Documentation, Stettbachstrasse 6, 8600 Duebendorf, Switzerland. Electronic address: sabine.goldhahn@aofoundation.org. 2. Department of Orthopaedic Surgery, Yokosuka Municipal Hospital, Yokosuka, Japan. Electronic address: ryotake007@gmail.com. 3. Institute for Medical Science in Sports, Osaka Health Science University, Osaka, Japan. Electronic address: viader7jp@yahoo.co.jp. 4. Yawata Medical Center, Komatsu, Japan. Electronic address: ryu-nakamura@msj.biglobe.ne.jp. 5. Department of Orthopaedic Surgery & Joint Reconstructive Surgery, Toyama Municipal Hospital, Toyama, Japan. Electronic address: sawaguch@mxq.mesh.ne.jp.
Abstract
BACKGROUND: To assess responsiveness of the Japanese Knee Injury and Osteoarthritis Outcome Score (KOOS) and the Oxford Knee Score (OKS) in patients undergoing open-wedge HTO to treat knee osteoarthritis and/or osteonecrosis. METHODS: Patients completed a set of questionnaires before HTO surgery (baseline) and 1 year after surgery. The questionnaires comprised the validated Japanese versions of the KOOS, the OKS, and the SF-36v2 and a visual analogue scale (VAS) for local knee pain and general pain. The treating surgeon completed the Japanese Orthopedic Association (JOA) score for osteoarthritic knees. The study included 119 patients aged 64.7 ± 8.3, 116 were followed at 1 year. 90 patients had knee osteoarthritis (OA) solely. 28 patients suffered from both OA and osteonecrosis (ON); one patient had ON only. Responsiveness to change was assessed using the effect size (ES) between the baseline and the 1-year postoperative assessment and standardized response mean. A distribution-based approach was used to determine the minimally detectable change (MDC95) for the KOOS subscales, and the OKS. RESULTS: All instruments demonstrated statistically significant changes between the preoperative assessments and one year after surgery. All changes showed an improvement in score, but the condition-specific measures revealed higher responsiveness than the generic measures. All KOOS subscales, the OKS, the local pain VAS, and the JOA score showed large ESs (ES > 1.24) and SRMs (SRM>1.04). At a 95% confidence level, the respective MDCs were 15.83, 18.94, 15.22, 18.99 and 17.23 for the KOOS-Pain, KOOS-Symptoms, KOOS-ADL, KOOS-Sport/Rec, and KOOS-QOL subscales, respectively. The MDC95 for the OKS was 8.29. CONCLUSIONS: Both, the KOOS and OKS are responsive for use in Japanese-speaking patients with knee osteoarthritis and/or osteonecrosis who are undergoing HTO.
BACKGROUND: To assess responsiveness of the Japanese Knee Injury and Osteoarthritis Outcome Score (KOOS) and the Oxford Knee Score (OKS) in patients undergoing open-wedge HTO to treat knee osteoarthritis and/or osteonecrosis. METHODS:Patients completed a set of questionnaires before HTO surgery (baseline) and 1 year after surgery. The questionnaires comprised the validated Japanese versions of the KOOS, the OKS, and the SF-36v2 and a visual analogue scale (VAS) for local knee pain and general pain. The treating surgeon completed the Japanese Orthopedic Association (JOA) score for osteoarthritic knees. The study included 119 patients aged 64.7 ± 8.3, 116 were followed at 1 year. 90 patients had knee osteoarthritis (OA) solely. 28 patients suffered from both OA and osteonecrosis (ON); one patient had ON only. Responsiveness to change was assessed using the effect size (ES) between the baseline and the 1-year postoperative assessment and standardized response mean. A distribution-based approach was used to determine the minimally detectable change (MDC95) for the KOOS subscales, and the OKS. RESULTS: All instruments demonstrated statistically significant changes between the preoperative assessments and one year after surgery. All changes showed an improvement in score, but the condition-specific measures revealed higher responsiveness than the generic measures. All KOOS subscales, the OKS, the local pain VAS, and the JOA score showed large ESs (ES > 1.24) and SRMs (SRM>1.04). At a 95% confidence level, the respective MDCs were 15.83, 18.94, 15.22, 18.99 and 17.23 for the KOOS-Pain, KOOS-Symptoms, KOOS-ADL, KOOS-Sport/Rec, and KOOS-QOL subscales, respectively. The MDC95 for the OKS was 8.29. CONCLUSIONS: Both, the KOOS and OKS are responsive for use in Japanese-speaking patients with knee osteoarthritis and/or osteonecrosis who are undergoing HTO.
Authors: Andy S K Cheng; Ka-Chun Chan; Sum-Yuet Chan; Miu-Kwan Fan; Man-Kwan Fung; Oi-Yan Lee; Cindy T T Kwok; Jackson K K Wong Journal: Occup Ther Int Date: 2019-08-14 Impact factor: 1.448
Authors: Jesús Martín-Fernández; Roberto García-Maroto; Fco Javier Sánchez-Jiménez; Alonso Bau-González; Homero Valencia-García; Blanca Gutiérrez-Teira; Juan Carlos Arenaza; Lidia García-Pérez; Renata Linertová; Amaia Bilbao Journal: Health Qual Life Outcomes Date: 2017-09-29 Impact factor: 3.186