Scientific/Clinical Article| Volume 30, ISSUE 2, P208-213, April 2017

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The scapular dyskinesis test: Reliability, agreement, and predictive value in patients with subacromial impingement syndrome


      Study Design

      Prospective cohort.


      Assessment of scapular dysfunction is considered important in the clinical evaluation and treatment of patients with symptoms of subacromial impingement. However, sparse research has been conducted into the reliability and predictive value of clinical tests with which to identify scapular dyskinesis.

      Purpose of the Study

      To evaluate intrarater and interrater reliability and predictive value of the Scapular Dyskinesis Test (SDT) in patients with subacromial impingement syndrome.


      Forty-five patients with subacromial impingement syndrome were included. The presence of scapular dyskinesis was classified by 2 raters using the SDT. Intrarater and interrater reliabilities were examined and compared. Patients with and without scapular dyskinesis were compared in terms of Oxford Shoulder Score and EQ-5D-5L scores at baseline and 3 months, as well rating of overall improvement in shoulder condition.


      SDT could not be performed in 5 patients, leaving 40 patients for further analysis. Kappa with squared weights was 0.64 for rater A and 0.86 for rater B; the intrarater agreement was 88% for A and 96% for B. For interrater comparison, the Kappa value was 0.59 and agreement 86%. No statically significant differences in Oxford Shoulder Score and EQ-5D-5L baseline and change scores or overall improvement in shoulder condition at 3 months were observed between patients with or without scapular dyskinesis.


      Intrarater and interrater reliability and agreement of the SDT were determined. The findings that functional impairment and outcomes did not differ between patients with or without the presences of scapular dyskinesis may question the clinical value of the SDT in patients with subacromial impingement syndrome.

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      JHT Read for Credit

      Quiz: #481

      Record your answers on the Return Answer Form found on the tear-out coupon at the back of this issue or to complete online and use a credit card, go to There is only one best answer for each question.
      • #1.
        Data were based on a combination of
        • a.
          clinical examination results and X-Rays
        • b.
          clinical examination results and patient questionnaires
        • c.
          therapists questionnaires and physician examinations
        • d.
          video evaluation and manual examinations
      • #2.
        A primary purpose of the study was to determine the
        • a.
          role of physical therapy in the management of scapular dyskinesia
        • b.
          role of physical therapy in evaluating scapular dyskinesia
        • c.
          best practices for managing subacromial pain in patients demonstrating scapular dyskineasia
        • d.
          reliability of the SDT
      • #3.
        Clinical examination to determine the presence of scapular dyskinesia was based on the work of
        • a.
        • b.
        • c.
        • d.
          Rockwood and Matsen
      • #4.
        At baseline and at 3 months subject groups were compared using the
        • a.
        • b.
          OSS and EQ-5D-5L
        • c.
          McClure scapular evaluation technique
        • d.
      • #5.
        The authors suggest there is insufficient evidence that the SDT is of significant clinical value in assessing the role of scapular dyskinesia in subacromial pathology
        • a.
        • b.
      When submitting to the HTCC for re-certification, please batch your JHT RFC certificates in groups of 3 or more to get full credit.