*2.2. Data Collection*

Comorbidities, history of the infected shoulder arthroplasty, the score of the Charlson comorbidity index (CCI) [9], laboratory values including serum C-reactive protein (CRP), and serum leucocyte count were recorded on admission. In addition, the following data were extracted for all patients: leucocyte count, microbiological and histopathological results of aspiration, number of revision surgeries between stages, length of interval between explantation and reimplantation, and microbiological and histopathological results of all surgeries. Furthermore, component loosening was evaluated radiologically and intraoperatively and documented in our database for every patient, as well as intraoperative findings such as cloudy fluid or gross intra-articular purulence. Patients were seen in our outpatient clinic postoperatively after 3, 6, and 12 months and after that period, annually. Clinical and radiological evaluations were performed by an orthopedic surgeon and infectious disease specialist. A standardized questionnaire evaluating the general health, joint and skin status, any additional surgical interventions, and antibiotic use was performed. Further follow-up was performed, contacting the patients by phone or during the visit in our outpatient clinic. The primary outcome measurements analyzed were treatment success in terms of infection eradication, successful reimplantation, and patient survival.
