Rotator cuff tear is one of the most common disorders of the shoulder. To examine the prognostic indicators associated with clinical outcome in rotator cuff surgery, a retrospective evaluation of 28 multivariate factors in 1,120 shoulders in 1,067 patients was performed. The data was analyzed by logistic regression and Kendall's tau-b correlation analysis. The degree of degenerative changes correlated with several factors that were selected for further evaluation using logistic regression by forward stepwise analysis. The results show that there was a high correlation with age, degree and type of tendon tear, preoperative pain and preoperative muscle power. The correlation between the type of tear, surgical outcome and the other factors in RCT was analyzed by nonparametric correlation methods. High correlation was seen between the type of tear and the tendons involved, degree of retraction, age, subacromial bone spur, operative technique,pre-and post-operative muscle power, pre-operative abduction and hand dominance. Additionally, there was a high correlation between good post-operative outcome and post-operative activities of daily living, post-operative pain, post-operative muscle power, degree of tendon retraction, pre-operative activities of daily living, type of tendon tear, pre-operative external rotation, muscle power and pain, and duration of symptoms.
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