Correlation between static limb alignment and peak knee adduction angle during gait is affected by subject pain in medial knee osteoarthritis.
Gait analysis
Knee adduction angle
Knee adduction moment
Knee osteoarthritis
Subjective pain
Journal
The Knee
ISSN: 1873-5800
Titre abrégé: Knee
Pays: Netherlands
ID NLM: 9430798
Informations de publication
Date de publication:
Mar 2020
Mar 2020
Historique:
received:
10
01
2019
revised:
23
10
2019
accepted:
13
11
2019
pubmed:
7
12
2019
medline:
4
11
2020
entrez:
7
12
2019
Statut:
ppublish
Résumé
Although increases in knee adduction moment (KAM) and angle (KAA) during gait are considered key pathologies that produce mechanical overload in the medial compartment of knee osteoarthritis (OA), it is unclear how these pathologies are related to subjective pain. The purpose of this study was to examine how subjective pain is related to such pathologies. Gait analysis was performed in 31 participants with medial knee OA. The knees were classified into three groups based on Kellgren-Lawrence (KL) grade: early (0 and 1), moderate (2), and severe (3 and 4). Subjective pain was evaluated by the Western Ontario and McMaster Universities (WOMAC) osteoarthritis index pain score. The knees were classified into low- and high-pain groups based on the pain score. The WOMAC pain score did not correlate with either peak KAM or peak KAA. Although a positive correlation between static limb alignment and peak KAA was observed in the low-pain group, it was not observed in the high-pain group. Knee flexion angle at heel strike correlated negatively with the gap between static femorotibial angle and peak KAA in the high-pain group. Although a direct correlation between subjective pain and peak KAM or KAA was not observed, our results suggest a compensatory movement in the high-pain group of participants to reduce KAA increases in the early stance phase. Such movements would be one of the reasons why it is difficult to obtain a consistent relationship between subjective pain and load-related parameters.
Sections du résumé
BACKGROUND
BACKGROUND
Although increases in knee adduction moment (KAM) and angle (KAA) during gait are considered key pathologies that produce mechanical overload in the medial compartment of knee osteoarthritis (OA), it is unclear how these pathologies are related to subjective pain. The purpose of this study was to examine how subjective pain is related to such pathologies.
METHODS
METHODS
Gait analysis was performed in 31 participants with medial knee OA. The knees were classified into three groups based on Kellgren-Lawrence (KL) grade: early (0 and 1), moderate (2), and severe (3 and 4). Subjective pain was evaluated by the Western Ontario and McMaster Universities (WOMAC) osteoarthritis index pain score. The knees were classified into low- and high-pain groups based on the pain score.
RESULTS
RESULTS
The WOMAC pain score did not correlate with either peak KAM or peak KAA. Although a positive correlation between static limb alignment and peak KAA was observed in the low-pain group, it was not observed in the high-pain group. Knee flexion angle at heel strike correlated negatively with the gap between static femorotibial angle and peak KAA in the high-pain group.
CONCLUSIONS
CONCLUSIONS
Although a direct correlation between subjective pain and peak KAM or KAA was not observed, our results suggest a compensatory movement in the high-pain group of participants to reduce KAA increases in the early stance phase. Such movements would be one of the reasons why it is difficult to obtain a consistent relationship between subjective pain and load-related parameters.
Identifiants
pubmed: 31806512
pii: S0968-0160(19)30262-5
doi: 10.1016/j.knee.2019.11.008
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
348-355Informations de copyright
Copyright © 2019 Elsevier B.V. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of competing interest The author(s) declare no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. This study was financially supported by Teijin Limited.