Purpose: The purposes of this study were to (1) evaluate changes in recovery patterns [i.e., clinical outcomes, range of motion (ROM)] in the first 12 months following surgery, (2) identify potential prognostic factors of early clinical outcomes after rotator cuff repair (RCR).
Methods: The study cohort included 344 consecutive patients treated with RCR. Data were collected prospectively and included pre- and perioperative variables. Univariate and multivariate linear regression analyses for various parameters including demographics, pre- and perioperative variables were used to predict shoulder function at 12-month follow-up, as measured by clinical outcomes and ROM.
Results: Significant improvement in all clinical scores and ROM were noted during serial follow-ups after RCR (all p < 0.001). Multivariate analysis revealed that female sex, older age, more anchors, diabetes mellitus, and preoperative stiffness were independently associated with worse shoulder function 3 months after RCR. Including the 3 months factors, heavy labor, use of the suture-bridge technique, and large tears were also independently associated with worse outcomes 6 months after surgery. Heavy labor, suture-bridge technique, diabetes mellitus, and preoperative stiffness were associated with significantly worse functional outcomes at 12 months after surgery (all p < 0.05).
Conclusion: Functional recovery based on clinical outcomes (i.e., UCLA, ASES scores) showed approximately 60% of ultimate recovery at 3 months and approximately 75% recovery at 6 months after RCR. Female sex, diabetes mellitus, preoperative stiffness, a larger number of anchors, suture bridge technique, heavy labor, old age and, larger tears were prognostic factors of poor clinical results or ROM in the short-term follow-up intervals. Knowledge of these prognostic factors may lead to improved insight for physicians to predict the pattern of the recovery and patient expectations accordingly.
Level of evidence: III, A cohort study.
Keywords: Prognostic factors; Rotator cuff; Rotator cuff repair; Shoulder function; Speed of recovery.