Geneva, Jan. 12 -- International Clinical Trials Registry received information related to the study (ISRCTN17277871) titled 'Perioperative complications and autonomic function assessed by the COMPASS-31 tool' on Dec. 18, 2025.

Study Type: Observational

Study Design: Multi-centre observational cohort study across surgical services in NHS hospitals. (Diagnostic, Prevention)

Primary Sponsor: Queen Mary University of London

Condition: Autonomic function in people undergoing major noncardiac surgery under general anaesthesia Nervous System Diseases

Intervention: Composite Autonomic Symptom Score-31 within 30 days after surgery.

Recruitment Status: Recruiting

Phase: Not Applicable

Date of First Enrollment: 15/11/2025

Target Samp...