title: Interobserver reliability of the Turkish version of the expanded and revised gross motor function classification system.
abstract: OBJECTIVE
  Cerebral palsy (CP) is the most common disability in childhood. The gross motor function classification system (GMFCS) has become an important tool to assess motor function in CP patient. In 2007, the expanded and revised (E&R) version of GMFCS which includes age band for youth 12-18 years of age was developed. The aim of this study was to evaluate reliability of Turkish version of expanded and revised GMCS.
  
  
  METHODS
  We assessed interobserver reliability between two physical medicine and rehabilitation specialists in 136 children with CP and test-retest reliability within a subgroup of 48 patients. Percent agreement, intraclass correlation coefficient (ICC) and μ statistics were used to evaluate reliability.
  
  
  RESULTS
  The ICC between two physicians was 0.97 and the total agreement was 89%. This result indicates excellent agreement. The overall weighted μ was 0.86. High test-retest reliability was found (ICC: 0.94 95% confidence interval) and the total agreement was 75% for test-retest reliability.
  
  
  CONCLUSIONS
  The Turkish version of the E&R GMFCS is shown to be reliable and valid for assessment of Turkish CP children.
authors: Department of Physical Medicine and Rehabilitation, Dokuz Eylül University Faculty of Medicine, İzmir, Turkey. elozlem@yahoo.com
authors: Ozlem
authors: O
authors: El
authors: Meltem
authors: M
authors: Baydar
authors: Haluk
authors: H
authors: Berk
authors: Ozlen
authors: O
authors: Peker
authors: Can
authors: C
authors: Koşay
authors: Yücel
authors: Y
authors: Demiral
mesh_terms: D000293:Adolescent; D002547:Cerebral Palsy / Q000150:complications / Q000503:physiopathology*; D002648:Child; D016001:Confidence Intervals; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D009048:Motor Skills / Q000145:classification*; D019957:Motor Skills Disorders / Q000145:classification* / Q000150:complications / Q000175:diagnosis; D009460:Neurologic Examination / Q000379:methods / Q000592:standards*; D015588:Observer Variation; D011361:Professional Competence; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D014421:Turkey