title: Lasting Improvement of Patient-Reported Outcomes 6 Months After Patellofemoral Pain Rehabilitation.
abstract: OBJECTIVE
  Hip- and knee-muscle-strengthening programs are effective in improving short-term patient-reported and disease-oriented outcomes in individuals with patellofemoral pain (PFP), but few to no data exist on moderate- to long-term postrehabilitative outcomes. The first purpose of the study was to assess differences in pain, function, strength, and core endurance in individuals with PFP before, after, and 6 mo after successful hip- or knee-muscle-strengthening rehabilitation. The second purpose was to prospectively follow these subjects for PFP recurrence at 6, 12, and 24 mo postrehabilitation.
  
  
  METHODS
  For 24 mo postrehabilitation, 157 physically active subjects with PFP who reported treatment success were followed. At 6 mo postrehabilitation, pain, function, hip and knee strength, and core endurance were measured. At 6, 12, 18, and 24 mo, PFP recurrence was measured via electronic surveys.
  
  
  RESULTS
  Sixty-eight subjects (43%) returned to the laboratory at 6 mo. Regardless of rehabilitation program, subjects experienced significant improvements in pain and function, strength, and core endurance pre- to postrehabilitation and maintained improvements in pain and function 6 mo postrehabilitation (Visual Analog Scale/Pain-pre 5.12 ± 1.33, post 1.28 ± 1.14, 6 mo 1.68 ± 2.16 cm, P < .05; Anterior Knee Pain Scale/Function-pre 76.38 ± 8.42, post 92.77 ± 7.36, 6 mo 90.27 ± 9.46 points, P < .05). Over the 24 mo postrehabilitation, 5.10% of subjects who responded to the surveys reported PFP recurrence.
  
  
  CONCLUSIONS
  The findings support implementing a hip-or knee-muscle-strengthening program for the treatment of PFP. Both programs improve pain, function, strength, and core endurance in the short term with moderate- and long-term benefits of improved pain and function and low PFP recurrence.
authors.forename: Karrie L
authors.initials: KL
authors.lastname: Hamstra-Wright
authors.forename: Burcu
authors.initials: B
authors.lastname: Aydemir
authors.forename: Jennifer
authors.initials: J
authors.lastname: Earl-Boehm
authors.forename: Lori
authors.initials: L
authors.lastname: Bolgla
authors.forename: Carolyn
authors.initials: C
authors.lastname: Emery
authors.forename: Reed
authors.initials: R
authors.lastname: Ferber
mesh_terms: D000328:Adult; D005260:Female; D006615:Hip; D006801:Humans; D007717:Knee; D008297:Male; D053580:Muscle Strength; D010146:Pain / Q000534:rehabilitation*; D059408:Pain Management; D010147:Pain Measurement; D046788:Patellofemoral Pain Syndrome / Q000534:rehabilitation*; D000071066:Patient Reported Outcome Measures; D010807:Physical Endurance; D011446:Prospective Studies; D016896:Treatment Outcome; D055815:Young Adult
keywords: PFP; anterior knee pain; physically active; treatment