Perioperative Blood Transfusion and Increased One-year Mortality

Association of Perioperative Blood Transfusion With Increased One-year Mortality After Surgery: a Retrospective Propensity Score-Matched Cohort Study

The goal of this retrospective observational study is to explore the association of perioperative blood transfusion with increased one-year mortality in patients undergoing surgeries. The main question it aims to answer perioperative blood transfusion is associated with increased one-year mortality across various surgical settings. We will retrospectively collect the clinical data (including one-year mortality) in patients with perioperative blood transfusion or not and analysis the association between perioperative blood transfusion and one-year mortality after surgery.

Inclusion Criteria:

• ≥18 years
• Patients undergoing first-time cardiothoracic surgery, orthopedics, obstetrics and gynecology, general surgery, otolaryngology, hand surgery, neurosurgery, colorectal surgery, urology, plastic surgery, and oral and maxillofacial surgery were included.

Exclusion Criteria:

• Patients with missing values for the American Society of Anesthesiologists (ASA) physical status, revised cardiac risk index (RCRI), degree of preoperative anemia, kidney disease, or race were excluded.