title: Factors Associated With Dynamic Balance in People With Knee Osteoarthritis.
abstract: OBJECTIVE
  To identify potential neuromuscular factors associated with dynamic balance in individuals with knee osteoarthritis (OA).
  
  
  METHODS
  Cross-sectional observational study; backward stepwise multiple linear regression was used to identify factors associated with dynamic balance in 2 statistical models.
  
  
  METHODS
  University clinical research laboratory.
  
  
  METHODS
  Individuals aged ≥50 years (N=52) with osteoarthritic changes on radiograph participated.
  
  
  METHODS
  Not applicable.
  
  
  METHODS
  Dynamic balance was assessed using the Community Balance and Mobility Scale (CB&M). Potentially modifiable neuromuscular factors associated with dynamic balance were measured, including the sum of concentric and eccentric lower-extremity muscle strength, 2 quadriceps-hamstrings muscle strength ratios, knee joint proprioception (joint position sense), anticipatory postural control velocity, and knee joint range of motion.
  
  
  RESULTS
  The first model for explaining variance in CB&M scores consisted of eccentric lower-extremity muscle strength and knee joint range of motion as factors. The model containing these 2 variables explained 50% of the variance in CB&M scores. The second model adjusted for descriptive variables, including age, body mass index, and knee pain, contained only the neuromuscular variables eccentric lower-extremity muscle strength, and explained 68% of the variance in CB&M scores.
  
  
  CONCLUSIONS
  These results suggest that muscle strength and, to a lesser extent, knee joint range of motion are important factors associated with dynamic balance as measured by the CB&M and should be considered in dynamic balance interventions.
authors.affiliation: Department of Physical Therapy, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Judit
authors.initials: J
authors.lastname: Takacs
authors.affiliation: School of Kinesiology, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Mark G
authors.initials: MG
authors.lastname: Carpenter
authors.affiliation: Department of Physical Therapy, University of British Columbia, Vancouver, BC, Canada.
authors.forename: S Jayne
authors.initials: SJ
authors.lastname: Garland
authors.affiliation: Department of Physical Therapy, University of British Columbia, Vancouver, BC, Canada. Electronic address: michael.hunt@ubc.ca.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Hunt
mesh_terms: D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D053580:Muscle Strength / Q000502:physiology; D018482:Muscle, Skeletal / Q000503:physiopathology; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000534:rehabilitation; D010147:Pain Measurement; D004856:Postural Balance / Q000502:physiology*; D011434:Proprioception / Q000502:physiology; D011859:Radiography; D016059:Range of Motion, Articular / Q000502:physiology; D019415:Torque
keywords: Linear models; Muscle strength; Osteoarthritis, knee; Postural balance; Rehabilitation