title: Physical performance measurement in persons with patellofemoral osteoarthritis: A pilot study.
abstract: BACKGROUND
  Patellofemoral osteoarthritis (PFOA) is associated with pain and decreased self-reported function. The impact of PFOA on actual physical performance is currently unknown.
  
  
  OBJECTIVE
  To investigate the impact of PFOA on physical performance and pain.
  
  
  METHODS
  Eight participants aged 40-65 years with bilateral, symptomatic, radiographic PFOA and 7 age- and gender-matched pain-free control participants without radiographic PFOA were studied. Physical performance was measured with the Timed-Up-and-Go (TUG) and 50-foot Fast-Paced-Walk (FPW) tests. Dependent variables included time to complete the TUG and FPW; pretest-posttest change in pain intensity (TUG and FPW); and self-reports of perceived knee pain, stiffness, and physical function. Data were analyzed with nonparametric statistics.
  
  
  RESULTS
  The PFOA group TUG time was longer than the control group (p=0.01). No difference between groups was found for FPW time. Pretest-posttest pain increased for the TUG and FPW in PFOA participants (p< 0.05). The PFOA group reported greater knee pain, stiffness, and less physical function than controls (previous 48 hours) (p < 0.01).
  
  
  CONCLUSIONS
  Symptomatic, radiographic PFOA is associated with increased pain during the TUG and FPW tests and longer time required to complete the TUG. The TUG may be a more sensitive test of physical performance in PFOA.
authors.affiliation: Department of Physical Therapy, Samson College of Health Sciences, University of the Sciences, Philadelphia, PA, USA.
authors.forename: Lisa T
authors.initials: LT
authors.lastname: Hoglund
authors.affiliation: Health Sciences Department, Drexel University, Philadelphia, PA, USA.
authors.forename: Margery A
authors.initials: MA
authors.lastname: Lockard
authors.affiliation: Department of Anatomy and Cell Biology, School of Medicine, Temple University, Philadelphia, PA, USA.
authors.forename: Mary F
authors.initials: MF
authors.lastname: Barbe
authors.affiliation: Leon Root, MD Motion Analysis Laboratory, Hospital for Special Surgery, New York, NY, USA.
authors.forename: Howard J
authors.initials: HJ
authors.lastname: Hillstrom
authors.affiliation: Gait Study Center, School of Podiatric Medicine, Temple University, Philadelphia, PA, USA.
authors.forename: Jinsup
authors.initials: J
authors.lastname: Song
authors.affiliation: Musculoskeletal and Trauma Radiology, School of Medicine, Temple University, Philadelphia, PA, USA.
authors.forename: William R
authors.initials: WR
authors.lastname: Reinus
authors.affiliation: College of Health Professions, Pacific University, Hillsboro, OR, USA.
authors.forename: Ann E
authors.initials: AE
authors.lastname: Barr-Gillespie
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007717:Knee / Q000503:physiopathology; D007719:Knee Joint / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000503:physiopathology*; D010146:Pain / Q000503:physiopathology*; D010147:Pain Measurement; D010865:Pilot Projects; D057566:Self Report; D016138:Walking / Q000502:physiology*
keywords: Osteoarthritis; knee; pain measurement; patellofemoral; physical performance