Routine Data Analysis
To support the project, we analyze BARMER claims data with the following objectives:

• Identifying frequently performed outpatient surgical procedures to facilitate an evidence-based selection of relevant procedures for PROM (Patient-Reported Outcome Measures) assessment.
• Mapping postoperative complications of the selected procedures via routine administrative data using:
  
  • ICD-10 codes for complications (e.g., hemorrhages, postoperative infections)
  • ATC codes for analgesic prescriptions (e.g., opioids, anti-inflammatory drugs)
  • Hospital readmissions within 30 to 90 days
  • Secondary surgical interventions indicative of a complication
• Identifying patient-specific risk factors associated with an increased likelihood of complications.
• Analyzing regional variations in UFO rates to detect potential differences in healthcare quality and geographic patterns.

Patient Involvement
The perspectives and firsthand experiences of patients undergoing surgical procedures play a central role in the project. Therefore, the initiative is continuously supported by a Patient Advisory Board. During advisory board meetings, researchers and patients collaboratively deliberate on project content, methodological approaches, and findings. For instance, patients provide insight into experienced symptoms of impending complications or share their experiences regarding inpatient and outpatient postoperative care. These insights directly inform the development of the survey instrument.
Patient involvement within the UFO project is integrated into the initiative "Joint Research with Citizens" of the Institute of General Practice and the "Patient Involvement" Working Group of the Center for Health Services Research. Furthermore, in collaboration with general practitioners through the RESPoNsE Teaching and Research Practice Network of the Institute of General Practice, we are exploring how the developed survey instrument can be integrated into postoperative follow-up care.
Would you like to participate in the project as a patient or general practitioner, or do you have feedback for us? Please let us know. Contact:

• Prof. Dr. Verena Vogt
• Meik Hildebrand, M.Sc.
• Anni Matthes, M.Sc.
• Richard Schmidt
• Josephine Storch, M.Sc.
• Prof. Dr. med. J. Bleidorn

• Klinik für Anästhesiologie und Intensivmedizin (KAI), Universitätsklinikum Jena: apl. Prof. Dr. Winfried Meißner (Projektleitung, Konsortialführung)
• Bundesverband für Ambulantes Operieren e.V. (BAO)
• BARMER
• Deutsche Gesellschaft für Anäesthesiologie und Intensivmedizin (DGAI)
• Deutsche Gesellschaft für Allgemein- und Viszeralchirurgie (DGAV)

• Aktionsbündnis für Patientensicherheit (APS)