Concerns have been raised regarding the Constant score due to a low overall reliability, with 95% confidence limits of between 15 and 20 points from the true score.[ 3 ] In addition, there is an increasing trend toward the use of patient reported outcome measures, being subjective, assessing the patients perception of their own functional status.[ 4 ] This has led to the development of validated joint-specific questionnaires, of which the Oxford shoulder score (OSS) is one.[ 5 ] The OSS is a 12-point quest
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