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Life sciences · Observational Study
ClinicalTrials.gov · September 14, 2026
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Observational Study.
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Registry record from ClinicalTrials.gov (NCT07818057). This is a study registration, not published results. Lead sponsor: Chinese PLA General Hospital. Recruitment status: COMPLETED. Study type: OBSERVATIONAL. Enrollment: 10536 participants (ACTUAL). Conditions: Depressive Disorder. Interventions: OTHER: Retrospective data analysis. Primary outcome measures: 1-year all-cause mortality after surgery , 12 months after surgery. Brief summary: This is a retrospective observational study based on our hospital's prospective peri-operative elderly patient database. We aim to evaluate the correlation between the 9-item Patient Health Questionnaire (PHQ-9) and the brief 3-item Patient Health Questionnaire (PHQ-3) for screening depressive symptoms among elderly surgical patients. Secondary outcomes include the associations of the two scales with adverse events: 30-day post-operative mortality, readmission, surgical site infection, delirium, and 1-year all-cause mortality. No additional interventions will be performed; only existing routinely-collected clinical data will be analysed.