Abstract
Purpose: Minimal research has examined the prognostic ability of shoulder examination data or psychosocial factors in predicting patient-reported disability following surgery for rotator cuff pathology. The purpose of this study was to examine these factors for prognostic value in order to help clinicians and patients understand preoperative factors that impact disability following surgery.Methods: Sixty-two patients scheduled for subacromial decompression with or without supraspinatus repair were recruited. Six-month follow-up data were available for 46 patients. Patient characteristics, history of the condition, shoulder impairments, psychosocial factors, and patient-reported disability questionnaires were collected preoperatively. Six months following surgery, the Western Ontario Rotator Cuff Index (WORC) and global rating of change dichotomized subjects into responders versus nonresponders. Logistic regression quantified prognostic ability and created the most parsimonious model to predict outcome.Results: Being on modified job duty (OR = .17, 95%CI: 0.03–0.94), and having a worker’s compensation claim (OR = 0.08, 95%CI: 0.01–0.74) decreased probability of a positive outcome, while surgery on the dominant shoulder (OR = 11.96, 95%CI: 2.91–49.18) increased probability. From the examination, only impaired internal rotation strength was a significant univariate predictor. The Fear-avoidance Beliefs Questionnaire (FABQ) score (OR = 0.95, 95%CI: 0.91–0.98) and the FABQ_work subscale (OR = 0.92, 95%CI: 0.87–0.97) were univariate predictors. In the final model, surgery on the dominant shoulder (OR = 8.9, 95%CI 1.75–45.7) and FABQ_work subscale score ≤25 (OR = 15.3, 95%CI 2.3–101.9) remained significant.Discussion: Surgery on the dominant arm resulted in greater improvement in patient-reported disability, thereby increasing the odds of a successful surgery. The predictive ability of the FABQ_work subscale highlights the potential impact of psychosocial factors on patient-reported disability.Implications for RehabilitationImpairment-based shoulder measurements were not strong predictors of patient-reported outcome.Having high fear-avoidance behavior scores on the FABQ, especially the work subscale, resulted in a much lower chance of responding well to rotator cuff surgery as measured by self-reported disability.Having surgery on the dominant shoulder, as compared to the nondominant side, resulted in larger improvements in disability levels.
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