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The development and validation of an appraisal method for rotator cuff disorders: the Korean Shoulder Scoring System
Suk-Kee Tae1, Yong-Girl Rhee, Tae-Soo Park
1Research Committee of the Korean Shoulder and Elbow Society, Seoul, Korea.
Hypothesis:
The purpose of this study was to develop and validate a disease-specific appraisal method for patients with rotator cuff disorders. The Korean Shoulder Scoring System (KSS) includes 5 domains totalling 100 points: function, 30 points; pain, 20; satisfaction, 10; range of motion, 20; and muscle power, consisting of strength, 10; and endurance, 10.
Method:
The KSS was used to evaluate clinical outcomes of 430 patients with rotator cuff disorder for a period of 6 months postoperatively.
Result:
The KSS had an acceptable level of internal consistency (alpha = 0.840). The KSS scores also correlated strongly with the Constant scores (r = 0.802), but less so with the American Shoulder and Elbow Surgeons scores (r = 0.602) and the University of California Los Angeles shoulder scores (r = 0.573). A large effect size (r = 1.234) and a standardized response mean (r = 1.317) for KSS were evident at 6 months postoperatively.
Conclusion:
The KSS is a useful measurement tool that combines subjective and objective evaluations for shoulder function related to rotator cuff disorders.
