Abstract
Background To identify limitation of combined shoulder movements, the scratch test has been widely used in clinical settings. However, no study has examined the relationship between the scratch test and glenohumeral (GH) joint passive range of motion (PROM). Purpose To investigate the relationship between the scratch test and GH internal rotation (IR) and horizontal adduction (HA) PROM. Study design Cross-sectional study. Methods Twenty-four healthy subjects were recruited in this study. Bilateral GH IR and HA PROM were measured using a smartphone application in supine position with 90° of shoulder and elbow flexion. Value of the scratch test was measured using tape measures. Pearson product moment correlations were performed to identify correlation between the scratch test and GH IR and HA PROM. Results Significant correlation between the scratch test and GH IR PROM (<italic>p</italic>=0.004, <italic>r</italic>=−0.408 and GH HA PROM (<italic>p</italic><0.001, <italic>r</italic>=−0.620) was revealed. Conclusions These findings suggest that the scratch test could be helpful as well as quick measurement to identify GH joint ROM.
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