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The association between knee confidence and muscle power, hop performance, and postural orientation in people with anterior cruciate ligament injury

Ageberg, Eva LU and Roos, Ewa M. LU (2016) In Journal of Orthopaedic and Sports Physical Therapy 46(6). p.477-482
Abstract

STUDY DESIGN: Cross-sectional. BACKGROUND: The association between muscle function and lack of knee confidence in people with anterior cruciate ligament (ACL) injury has not been well investigated. Such knowledge would help in the design of training programs for this population. OBJECTIVE: To investigate associations between self-reported knee confidence and muscle function in patients with ACL injury. METHODS: Cross-sectional data from 54 patients (mean age, 30 years; range, 20-39 years; 28% women) with ACL injury, treated with training and reconstructive surgery (n = 36) or training only (n = 18), were assessed 3 ± 1 years after injury. Univariate and multivariable ordinal regression analyses were conducted to test the association... (More)

STUDY DESIGN: Cross-sectional. BACKGROUND: The association between muscle function and lack of knee confidence in people with anterior cruciate ligament (ACL) injury has not been well investigated. Such knowledge would help in the design of training programs for this population. OBJECTIVE: To investigate associations between self-reported knee confidence and muscle function in patients with ACL injury. METHODS: Cross-sectional data from 54 patients (mean age, 30 years; range, 20-39 years; 28% women) with ACL injury, treated with training and reconstructive surgery (n = 36) or training only (n = 18), were assessed 3 ± 1 years after injury. Univariate and multivariable ordinal regression analyses were conducted to test the association between the patient's knee confidence (question 3 from the Knee injury and Osteoarthritis Outcome Score as the dependent variable) and performance on tests of muscle power, hop performance, and postural orientation (test for substitution patterns score) as independent variables (absolute value on the injured leg, and limb symmetry index [LSI; injured leg/uninjured leg × 100] or absolute difference between the injured and uninjured legs). RESULTS: Sixteen patients reported no trouble with lack of knee confidence, 24 mild trouble, 10 moderate trouble, and 4 severe or extreme trouble. Univariate analyses revealed significant associations between worse knee confidence and lower (worse) LSIs for knee extension power, vertical jump, and side hop, and worse test for substitution patterns scores. In the multivariable analysis, worse vertical jump LSI (P =.043) and worse side hop LSI (P =.012) significantly accounted for 25% of the variation in perceived knee confidence. CONCLUSION: Between-leg differences during demanding tasks are associated with knee confidence in individuals with ACL injury.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Knee injury, Performance-based measures, Quality of life, Self-reported outcomes
in
Journal of Orthopaedic and Sports Physical Therapy
volume
46
issue
6
pages
6 pages
publisher
J O S P T, Alliance Group Communications
external identifiers
  • scopus:84971440008
  • wos:000377054800011
ISSN
0190-6011
DOI
10.2519/jospt.2016.6374
language
English
LU publication?
yes
id
bbd99ab8-33c3-4bd6-901a-4b8f3b317236
date added to LUP
2017-01-25 14:35:18
date last changed
2017-09-18 11:34:01
@article{bbd99ab8-33c3-4bd6-901a-4b8f3b317236,
  abstract     = {<p>STUDY DESIGN: Cross-sectional. BACKGROUND: The association between muscle function and lack of knee confidence in people with anterior cruciate ligament (ACL) injury has not been well investigated. Such knowledge would help in the design of training programs for this population. OBJECTIVE: To investigate associations between self-reported knee confidence and muscle function in patients with ACL injury. METHODS: Cross-sectional data from 54 patients (mean age, 30 years; range, 20-39 years; 28% women) with ACL injury, treated with training and reconstructive surgery (n = 36) or training only (n = 18), were assessed 3 ± 1 years after injury. Univariate and multivariable ordinal regression analyses were conducted to test the association between the patient's knee confidence (question 3 from the Knee injury and Osteoarthritis Outcome Score as the dependent variable) and performance on tests of muscle power, hop performance, and postural orientation (test for substitution patterns score) as independent variables (absolute value on the injured leg, and limb symmetry index [LSI; injured leg/uninjured leg × 100] or absolute difference between the injured and uninjured legs). RESULTS: Sixteen patients reported no trouble with lack of knee confidence, 24 mild trouble, 10 moderate trouble, and 4 severe or extreme trouble. Univariate analyses revealed significant associations between worse knee confidence and lower (worse) LSIs for knee extension power, vertical jump, and side hop, and worse test for substitution patterns scores. In the multivariable analysis, worse vertical jump LSI (P =.043) and worse side hop LSI (P =.012) significantly accounted for 25% of the variation in perceived knee confidence. CONCLUSION: Between-leg differences during demanding tasks are associated with knee confidence in individuals with ACL injury.</p>},
  author       = {Ageberg, Eva and Roos, Ewa M.},
  issn         = {0190-6011},
  keyword      = {Knee injury,Performance-based measures,Quality of life,Self-reported outcomes},
  language     = {eng},
  month        = {06},
  number       = {6},
  pages        = {477--482},
  publisher    = {J O S P T, Alliance Group Communications},
  series       = {Journal of Orthopaedic and Sports Physical Therapy},
  title        = {The association between knee confidence and muscle power, hop performance, and postural orientation in people with anterior cruciate ligament injury},
  url          = {http://dx.doi.org/10.2519/jospt.2016.6374},
  volume       = {46},
  year         = {2016},
}