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A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term

BACKGROUND: Identifying populations with poor muscle recovery after total hip arthroplasty (THA) is important for postoperative physical therapy. Preoperative muscle strength is a strong factor that determines postoperative muscle strength. However, this effect may depend on other factors. Thus, pre...

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Autores principales: Sekita, Junya, Takahira, Naonobu, Iwamura, Genki, Watanabe, Hiroyuki, Kusaba, Atsushi, Kondo, Saiji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8474772/
https://www.ncbi.nlm.nih.gov/pubmed/34579703
http://dx.doi.org/10.1186/s12891-021-04719-2
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author Sekita, Junya
Takahira, Naonobu
Iwamura, Genki
Watanabe, Hiroyuki
Kusaba, Atsushi
Kondo, Saiji
author_facet Sekita, Junya
Takahira, Naonobu
Iwamura, Genki
Watanabe, Hiroyuki
Kusaba, Atsushi
Kondo, Saiji
author_sort Sekita, Junya
collection PubMed
description BACKGROUND: Identifying populations with poor muscle recovery after total hip arthroplasty (THA) is important for postoperative physical therapy. Preoperative muscle strength is a strong factor that determines postoperative muscle strength. However, this effect may depend on other factors. Thus, predictive models with interaction terms are important for accurately predicting postoperative muscle strength. This study aimed to develop a predictive model for lower muscle strength 12 months after THA which incorporates interaction terms. METHODS: Subjects were female patients with hip osteoarthritis who underwent unilateral THA. Patients with locomotor disorders, neurological disorders, or postoperative complications were excluded. Hip abductor and knee extensor strength were measured, and a generalized linear model approach with preoperative muscle strength, age, body weight, height, disease duration, physical activity, and leg extension as explanatory variables was used to identify factors that determine muscle strength 12 months after THA. Models with interaction terms between preoperative muscle strength and other explanatory variables were also examined. RESULTS: A total of 82 patients were analyzed. Preoperative muscle strength, age, body weight, physical activity, and disease duration were extracted as factors that significantly and independently determine hip abductor and knee extensor strength. The interaction term between preoperative muscle strength and age was identified as a factor that significantly determines knee extensor strength. Regression coefficients for preoperative knee extensor strength and postoperative muscle strength were significant when age was +1 SD, but not when age was -1 SD. CONCLUSIONS: The predictive model demonstrated that lower muscle strength 12 months after THA is determined by preoperative muscle strength, age, weight, physical activity, disease duration, and preoperative muscle strength, with the effect of preoperative muscle strength on knee extensor strength being dependent on age. When predicting postoperative knee extensor strength using preoperative muscle strength, it is important to consider the effect of age.
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spelling pubmed-84747722021-09-28 A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term Sekita, Junya Takahira, Naonobu Iwamura, Genki Watanabe, Hiroyuki Kusaba, Atsushi Kondo, Saiji BMC Musculoskelet Disord Research BACKGROUND: Identifying populations with poor muscle recovery after total hip arthroplasty (THA) is important for postoperative physical therapy. Preoperative muscle strength is a strong factor that determines postoperative muscle strength. However, this effect may depend on other factors. Thus, predictive models with interaction terms are important for accurately predicting postoperative muscle strength. This study aimed to develop a predictive model for lower muscle strength 12 months after THA which incorporates interaction terms. METHODS: Subjects were female patients with hip osteoarthritis who underwent unilateral THA. Patients with locomotor disorders, neurological disorders, or postoperative complications were excluded. Hip abductor and knee extensor strength were measured, and a generalized linear model approach with preoperative muscle strength, age, body weight, height, disease duration, physical activity, and leg extension as explanatory variables was used to identify factors that determine muscle strength 12 months after THA. Models with interaction terms between preoperative muscle strength and other explanatory variables were also examined. RESULTS: A total of 82 patients were analyzed. Preoperative muscle strength, age, body weight, physical activity, and disease duration were extracted as factors that significantly and independently determine hip abductor and knee extensor strength. The interaction term between preoperative muscle strength and age was identified as a factor that significantly determines knee extensor strength. Regression coefficients for preoperative knee extensor strength and postoperative muscle strength were significant when age was +1 SD, but not when age was -1 SD. CONCLUSIONS: The predictive model demonstrated that lower muscle strength 12 months after THA is determined by preoperative muscle strength, age, weight, physical activity, disease duration, and preoperative muscle strength, with the effect of preoperative muscle strength on knee extensor strength being dependent on age. When predicting postoperative knee extensor strength using preoperative muscle strength, it is important to consider the effect of age. BioMed Central 2021-09-27 /pmc/articles/PMC8474772/ /pubmed/34579703 http://dx.doi.org/10.1186/s12891-021-04719-2 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Sekita, Junya
Takahira, Naonobu
Iwamura, Genki
Watanabe, Hiroyuki
Kusaba, Atsushi
Kondo, Saiji
A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term
title A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term
title_full A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term
title_fullStr A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term
title_full_unstemmed A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term
title_short A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term
title_sort predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8474772/
https://www.ncbi.nlm.nih.gov/pubmed/34579703
http://dx.doi.org/10.1186/s12891-021-04719-2
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