Timing of Surgical Treatment for High-Grade Acromioclavicular Joint Injuries Does Not Affect Functional Outcomes.

Purpose: To determine, using multivariate regression, whether patient-reported outcomes are associated with surgical timing to account for differences between groups. Methods: Patients who underwent acromioclavicular (AC) joint surgery from 2010 to 2019 were included if they underwent primary AC joint surgery for a Rockwood grade III-V AC joint separation. Chart review was conducted to determine time from injury to surgery, Rockwood injury grade, and surgical technique. Postoperative complications, revisions, American Shoulder and Elbow Surgeons (ASES) score, Single Assessment Numeric Evaluation (SANE) scores, and radiographic outcomes were collected. Radiographic outcomes were determined by measuring coracoclavicular (CC) distance on preoperative, immediate postoperative, and all follow-up anterior-posterior views of the operative shoulder. Multivariate regressions were conducted with postoperative ASES, SANE, and CC distance as the outcomes of interest. Results: Overall, 221 patients (104 early, 117 delayed) with an average age of 40 ± 15 years were included in this study. Significant differences in patient age, body mass index, injury grade, surgical technique used, and preoperative CC distance were observed between groups (all Conclusions: The timing of AC joint surgery did not affect functional outcomes in patients with AC joint separation. Level of Evidence: Level III, retrospective cohort study.