title: The Influence of Test Positions on Clinical Assessment for Scapular Dyskinesis.
abstract: BACKGROUND
  Appropriate evaluation of scapular dyskinesis is essential for therapeutic strategies. Although the current visual-based assessment is rapid and practical, the reliability of this method is unsatisfactory. It is necessary to adequately understand the conditions of assessment to maximize the benefit of therapeutic interventions.
  
  
  OBJECTIVE
  To explore the influence of different test positions on clinical assessment for scapular dyskinesis.
  
  
  METHODS
  Observational study.
  
  
  METHODS
  University rehabilitation department.
  
  
  METHODS
  A total of 102 subjects diagnosed with unilateral shoulder disorder were recruited from among rehabilitation outpatients from November 2015 to February 2016.
  
  
  METHODS
  Two experienced raters categorized the subjects' scapular movement pattern according to Kibler et al classification by the vision-palpation method at 4 test positions (at rest, and the end range of elevation in the sagittal, scapular, and coronal planes).
  
  
  METHODS
  The overall prevalence of scapular dyskinesis, the distribution of types, and the reproducibility of types at the 4 test positions were analyzed.
  
  
  RESULTS
  The overall prevalence of scapular dyskinesis was 90.08%, and the highest frequency was found at the resting position. Type III was the most common type in our sample. In reproducibility analysis, 21.57% of subjects presented with the same type at any position, and 75.49% of subjects presented with 2 types.
  
  
  CONCLUSIONS
  Scapular dyskinesis in individuals with shoulder disorder showed a high prevalence, especially at the resting position. More than 1 type of scapular pattern would be present if assessed at different positions. This study indicates that test positions can affect the results of scapular dyskinesis assessment, and that the resting position should primarily be applied.
  
  
  METHODS
  III.
authors.affiliation: Department of Rehabilitation Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China(∗).
authors.forename: Simin
authors.initials: S
authors.lastname: Deng
authors.affiliation: Department of Rehabilitation Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China(†).
authors.forename: Kang
authors.initials: K
authors.lastname: Chen
authors.affiliation: Department of Rehabilitation Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China(‡). Electronic address: myhmyh2006@126.com.
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Rehabilitation Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China(§).
authors.forename: Juan
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Rehabilitation Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China(‖).
authors.forename: Mi
authors.initials: M
authors.lastname: Huang
mesh_terms: D000328:Adult; D015331:Cohort Studies; D020820:Dyskinesias / Q000175:diagnosis* / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D056888:Patient Positioning / Q000379:methods*; D010808:Physical Examination / Q000379:methods; D016059:Range of Motion, Articular / Q000502:physiology*; D012540:Scapula / Q000503:physiopathology*; D012680:Sensitivity and Specificity; D012785:Shoulder Joint / Q000503:physiopathology; D020069:Shoulder Pain / Q000175:diagnosis* / Q000209:etiology