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Abstract
Background: Shoulder pain is a common clinical problem. Abnormal scapular motion has been implicated in different shoulder disorders. However, there is a lack of clinical evaluation tools to assess the scapular component of shoulder dysfunction. Symptom alteration tests may be useful in determining a subset of those with shoulder pathology who may benefit from interventions aimed to improve scapular motion abnormalities. Objectives: to investigate the intra-rater reliability of scapular repositioning test (SRT) in assessment of abnormal scapular motion in patients with secondary shoulder impingement syndrome (SIS). Methods: 79 subjects (65 males and 14 females) with mean age (29.78 ±10.20) who were referred to physiotherapy outpatient clinic with secondary shoulder impingement syndrome were recruited to estimate intra-rater reliability of SRT. Pain was assessed with Verbal Numeric Rating Scale; isometric rotator cuff muscle strength (RC) was measured by portable fixed hand held dynamometer. Pain and strength variables were measured with scapular neutral position and with two trials of SRT. Intraclass correlation coefficient (ICC) was used to estimate intra-rater reliability. Repeated measures Multivariate Analysis of Variance (MANOVA) was conducted to compare between the neutral scapular position and scapular reposition test (mean effect of the two trials) in pain and RC strength. Results: ICC values at 95% confidence intervals (CIs) for pain were (0.915), for shoulder elevation strength at scapular plane were (0.981), for external rotator strength at scapular plane were (0.994) and for internal rotation strength at scapular plane (0.987)