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Archives of Orthopaedic and Trauma Surgery

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01-01-2019 | Knee Arthroplasty

A novel preoperative scoring system for the indication of unicompartmental knee arthroplasty, as predictor of clinical outcome and satisfaction

Authors: Alexander Antoniadis, Dimitris Dimitriou, Jean Pierre Canciani, Naeder Helmy

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 1/2019

Abstract

Introduction

Proper patient selection is a crucial factor for the outcome of the unicompartmental knee arthroplasty (UKA). However, there is still not a clear consensus on which patients could benefit the utmost from a UKA. The purpose of this prospective study was to introduce a novel, preoperative, predictive score (Unicompartmental Indication Score, UIS) to aid proper patient selection in UKA.

Materials and methods

A total of 152 patients with an average age of 68 years and a mean follow-up of 27 months were evaluated preoperatively with the UIS and postoperative at every follow-up. Correlation analysis was applied to identify potential relationships between the UIS, functional outcomes, pain relief, patient satisfaction, and range of motion. The ROC analysis was used to identify the best cutoff value of the UIS, which would have predicted an optimal outcome following UKA.

Results

The majority of the patients (91%) were satisfied with the operation, with 61% reporting excellent and 30% good satisfaction. The UIS was positively correlated to the postoperative Knee Society Score (KSS) for both pain (r = 0.26, p < 0.001) and function (r = 0.31, p < 0.001). The UIS was also positively correlated to the patient satisfaction (p = 0.46, p < 0.001) and maximum postoperative flexion (r = 0.25, p < 0.001). The ROC analysis provided an ideal cutoff for UIS at 25 points (sensitivity: 75%, sensibility: 93%, area under the curve: 86%). At a mean follow-up of 27 months (range 24–37), we observed three revisions in 152 consecutive UKA with a mean UIS of 27 points (range 20–30).

Conclusions

The newly introduced UIS score might be a reliable preoperative scoring system to predict patients with excellent satisfaction, functional outcome, pain relief and possibly implant survivorship following UKA, and therefore, could help the proper patient selection and decision-making in UKA.

Level-of-evidence

Prospective study, II.

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Title: A novel preoperative scoring system for the indication of unicompartmental knee arthroplasty, as predictor of clinical outcome and satisfaction
Authors: Alexander Antoniadis
Dimitris Dimitriou
Jean Pierre Canciani
Naeder Helmy
Publication date: 01-01-2019
Publisher: Springer Berlin Heidelberg
Published in: Archives of Orthopaedic and Trauma Surgery / Issue 1/2019
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI: https://doi.org/10.1007/s00402-018-3069-8

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Springer Medicine

A novel preoperative scoring system for the indication of unicompartmental knee arthroplasty, as predictor of clinical outcome and satisfaction

Abstract

Introduction

Materials and methods

Results

Conclusions

Level-of-evidence

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Introduction

Materials and methods

Results

Conclusions

Level-of-evidence

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