Prevalence of scapular dyskinesis and inter-rater reliability of the scapular dyskinesis test in asymptomatic subjects
Abstract
Objective: To describe the presence of scapular dyskinesis (SD) in asymptomatic subjects using the scapular dyskinesis test (SDT) under three different conditions, and to assess inter-rater reliability.
Materials and method: This is a descriptive study conducted on asymptomatic subjects. The main variable was the degree of inter-rater agreement on the presence or absence of SD using the SDT under the following conditions: direct observation (rater A), both direct observation and videos (rater B), and exclusively videos (rater C).
Results: A total of 24 subjects were analyzed, with a mean age of 27.74 ± 4.39. They were divided into 2 groups: obvious SD and without SD. According to raters A and B, SD was present in 17 cases (70.83%), and according to rater C, SD was present in 20 cases (83.33%). The level of global agreement, measured as Kappa values, was 0.25. The levels of inter-rater agreement between raters A and B, between raters B and C, and between raters A and C—also measured as kappa values—were 0.11, 0. 41, and 0.24, respectively.
Conclusion: The presence of SD in asymptomatic adults reached at least 70% of the sample studied. The global inter-rater agreement between the three physical therapists was regular (κ: 0.25). The inter-rater agreement between the two physical therapists required to watch the videos was moderate (κ: 0.41).
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