Relationship Between Strength Parameters and Functional Performance Tests in Patients With Severe Knee Osteoarthritis.
Aged
Analysis of Variance
Arthroplasty, Replacement, Knee
/ rehabilitation
Cross-Sectional Studies
Female
Hospitals, University
Humans
Male
Middle Aged
Multivariate Analysis
Muscle Strength
/ physiology
Osteoarthritis, Knee
/ diagnosis
Outpatients
Pain Measurement
Physical Functional Performance
Preoperative Care
/ methods
Prognosis
Range of Motion, Articular
/ physiology
Recovery of Function
Regression Analysis
Retrospective Studies
Severity of Illness Index
Journal
PM & R : the journal of injury, function, and rehabilitation
ISSN: 1934-1563
Titre abrégé: PM R
Pays: United States
ID NLM: 101491319
Informations de publication
Date de publication:
08 2019
08 2019
Historique:
received:
10
04
2018
accepted:
22
11
2018
pubmed:
5
1
2019
medline:
3
7
2020
entrez:
5
1
2019
Statut:
ppublish
Résumé
Decreased leg muscle strength is a major determinant of reduced function in patients with knee osteoarthritis (OA). The identification of a strength parameter that is best correlated with functional performance is important for monitoring rehabilitation results. To determine which muscle strength measurements show the highest correlation with functional capacity in patients with severe knee OA shortly before total knee arthroplasty (TKA). Cross-sectional exploratory study. Outpatient rehabilitation department at a university teaching hospital. The sample included 75 patients (51 female) scheduled for primary TKA, recruited through multistage sampling. Independent variables were peak isometric, isokinetic concentric, and eccentric leg extensor strength measured on the leg press, as well as peak isometric knee extensor strength measured on the strength chair. Two multiple regression analyses were performed, one including all strength measures and the other including all of the strength ratios. Pearson correlation coefficients were calculated between the strength measures and functional test scores. Dependent variables were the Timed Up and Go Test (TUG) and the Stair Test (ST). The regression analysis including all strength measures could explain 11.9% of the variance of the TUG (P = .068, not significant [NS]) and 21.5% of the variance of the ST (P = .009, significant). The regression model for the strength ratios explained 11.8% of the variance of the TUG (P = .090, NS) and 6.3% of the ST (P = .217, NS). Although univariate analysis confirmed significant correlations between strength measurements and functional tests, multiple regression analysis revealed a higher predictive value for the ST than for the TUG. The use of both muscle strength tests and performance-based function tests is advisable to evaluate functional impairments of patients with knee OA. III.
Sections du résumé
BACKGROUND
Decreased leg muscle strength is a major determinant of reduced function in patients with knee osteoarthritis (OA). The identification of a strength parameter that is best correlated with functional performance is important for monitoring rehabilitation results.
OBJECTIVE
To determine which muscle strength measurements show the highest correlation with functional capacity in patients with severe knee OA shortly before total knee arthroplasty (TKA).
DESIGN
Cross-sectional exploratory study.
SETTING
Outpatient rehabilitation department at a university teaching hospital.
PATIENTS
The sample included 75 patients (51 female) scheduled for primary TKA, recruited through multistage sampling.
METHODS OR INTERVENTIONS
Independent variables were peak isometric, isokinetic concentric, and eccentric leg extensor strength measured on the leg press, as well as peak isometric knee extensor strength measured on the strength chair. Two multiple regression analyses were performed, one including all strength measures and the other including all of the strength ratios. Pearson correlation coefficients were calculated between the strength measures and functional test scores.
MAIN OUTCOME MEASUREMENTS
Dependent variables were the Timed Up and Go Test (TUG) and the Stair Test (ST).
RESULTS
The regression analysis including all strength measures could explain 11.9% of the variance of the TUG (P = .068, not significant [NS]) and 21.5% of the variance of the ST (P = .009, significant). The regression model for the strength ratios explained 11.8% of the variance of the TUG (P = .090, NS) and 6.3% of the ST (P = .217, NS).
CONCLUSIONS
Although univariate analysis confirmed significant correlations between strength measurements and functional tests, multiple regression analysis revealed a higher predictive value for the ST than for the TUG. The use of both muscle strength tests and performance-based function tests is advisable to evaluate functional impairments of patients with knee OA.
LEVEL OF EVIDENCE
III.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
834-842Informations de copyright
© 2019 American Academy of Physical Medicine and Rehabilitation.