Fig. 2

The test–retest with total WOOS%. The x-axis represents each subject individually, the height of the bars represents the difference in the test–retest, and the height represents the difference between the tests. The red color represents a positive difference, and the black color represents a negative difference when subtracting the result of the test from the re-test. Abbreviations: WOOS—Western Ontario Osteoarthritis of the Shoulder Index