title: Correlation of functional outcome and X-ray findings after Perthes disease.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the functional impairments during gait after Legg-Calvé-Perthes Disease (LCPD) and to correlate these data with the clinical and radiographic outcome.
  
  
  METHODS
  In 13 individuals with LCPD in recovery or final stage (mean age 9.5 ± 3.5 years) with unilateral hip involvement the clinical result was graded according to Tönnis and the radiographic outcome according to Heyman and Herndon; the functional impairment during gait was compared to a group of healthy children (n = 30, mean age 8.1 ± 1.2 years). All children underwent computerised three-dimensional gait analysis.
  
  
  RESULTS
  The standard physical examination resulted in 69.2% normal range of movement according to Tönnis, but overall analysis of gait revealed that only 30.7% had a normal gait pattern. All children with an excellent or good radiographic (n = 6) outcome walked normally or showed minor deviations.
  
  
  CONCLUSIONS
  The results of the standard clinical examination do not reflect the function of the hip joint during gait. Additional information is revealed from gait analysis and should be part of outcome studies in LCPD.
authors.affiliation: Department of Orthopaedics, University of Duesseldorf, Duesseldorf, Germany. westhoff@med.uni-duesseldorf.de
authors.forename: Bettina
authors.initials: B
authors.lastname: Westhoff
authors.forename: Christoph
authors.initials: C
authors.lastname: Zilkens
authors.forename: Andrea
authors.initials: A
authors.lastname: Reith
authors.forename: Eva
authors.initials: E
authors.lastname: Jelinek
authors.forename: Friederike
authors.initials: F
authors.lastname: Martiny
authors.forename: Reinhart
authors.initials: R
authors.lastname: Willers
authors.forename: Rüdiger
authors.initials: R
authors.lastname: Krauspe
mesh_terms: D001696:Biomechanical Phenomena; D002648:Child; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging / Q000473:pathology; D005684:Gait / Q000502:physiology*; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D006801:Humans; D007873:Legg-Calve-Perthes Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000628:therapy; D008297:Male; D010147:Pain Measurement; D011859:Radiography; D016059:Range of Motion, Articular; D020127:Recovery of Function