Patients with fibromyalgia have increased risk of 90-day postoperative adverse events following arthroscopic rotator cuff repair.

Background: Arthroscopic rotator cuff repair (RCR) is a common surgical intervention for symptomatic rotator cuff tears when conservative management fails. Understanding the potential correlation of short- and long-term outcomes associated with defined comorbidities can help with patient selection, counseling, and related care pathways. The association of fibromyalgia, one potential comorbidity, with outcomes following RCR has not been reported in the literature. Methods: Patients with and without fibromyalgia diagnosed prior to undergoing RCR were identified from the PearlDiver Mariner161 database between 2016 and April 30, 2022, using Current Procedural Terminology codes. The exclusion criteria were age less than 18 years, a diagnosis of neoplasm, trauma, or infection within 90 days prior to surgery, and postoperative records of fewer than 90 days. Patients with and without fibromyalgia were matched in a 1:4 ratio based on age, sex, and Elixhauser Comorbidity Index. Ninety-day adverse events were assessed. Severe adverse events were defined as the occurrence of sepsis, surgical site infection, cardiac events, deep vein thrombosis, or pulmonary embolism. Minor adverse events were defined as the occurrence of wound dehiscence, urinary tract infection, pneumonia, transfusion, hematoma, or acute kidney injury. Also identified was the occurrence of any adverse event, emergency department (ED) visits, and readmission. These outcomes were compared with multivariate analysis. 1-year revisions were assessed with Kaplan-Meier curves and compared with the log-rank test. Results: In total, 295,169 RCR patients were identified, of which fibromyalgia was noted for 12,366 (4.2%). Following matching, the final cohort sizes for those with and without fibromyalgia were 11,387 and 45,354, respectively. Diagnosis of fibromyalgia was independently associated with increased risk of all individual adverse events as well as aggregated incidence of severe, minor, and any adverse events ( Discussion and Conclusion: Fibromyalgia was associated with significantly increased 90-day postoperative adverse events and ED visits. These findings are relevant in surgical planning but are also balanced by a lack of difference in 1-year revisions.