Download PDF
J Knee Surg 2022; 35(01): 007-014
DOI: 10.1055/s-0040-1710573
Original Article

Construction and Comparison of Predictive Models for Length of Stay after Total Knee Arthroplasty: Regression Model and Machine Learning Analysis Based on 1,826 Cases in a Single Singapore Center

Hui Li‡   *
1   Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China
,
Juyang Jiao‡   *
1   Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China
,
Shutao Zhang
1   Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China
,
Haozheng Tang
1   Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China
,
Xinhua Qu
1   Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China
,
Bing Yue
1   Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China
› Author Affiliations Funding This research was supported by the National Natural Science Foundation of China (grant nos. 81972086, 81672196, and 51971222); Shanghai “Rising Stars of Medical Talent” Youth Development Program (Youth Medical Talents—Specialist Program); National Key Research and Development Project; “Technology Innovation Action Plan” Key Project of Shanghai Science and Technology Commission (grant no. 19411962800); Shanghai Municipal Education Commission—Gaofeng Clinical Medicine Grant Support (grant no. 20161423); Clinical Scientific Innovation and Cultivation Fund of Renji Hospital Affiliated School of Medicine, Shanghai Jiaotong University(grant no. PY2018-I-02).
› Further Information
   Buy Article Permissions and Reprints
Zoom Image

Abstract

The purpose of this study was to develop a predictive model for length of stay (LOS) after total knee arthroplasty (TKA). Between 2013 and 2014, 1,826 patients who underwent TKA from a single Singapore center were enrolled in the study after qualification. Demographics of patients with normal and prolonged LOS were analyzed. The risk variables that could affect LOS were identified by univariate analysis. Predictive models for LOS after TKA by logistic regression or machine learning were constructed and compared. The univariate analysis showed that age, American Society of Anesthesiologist level, diabetes, ischemic heart disease, congestive heart failure, general anesthesia, and operation duration were risk factors that could affect LOS (p < 0.05). Comparing with logistic regression models, the machine learning model with all variables was the best model to predict LOS after TKA, of whose area of operator characteristic curve was 0.738. Machine learning algorithms improved the predictive performance of LOS prediction models for TKA patients.

Keywords

length of stay - total knee arthroplasty - predictive model - machine learning

Note

The approval from Institutional Review Board (Sing-health CIRB 2014/651/D) was obtained prior to the start of the study.


* These authors contributed equally to this work.




Publication History

Received: 06 September 2019

Accepted: 31 March 2020

Article published online:
08 June 2020

© 2020. Thieme. All rights reserved.

Thieme Medical Publishers, Inc.
333 Seventh Avenue, 18th Floor, New York, NY 10001, USA