Postoperative mortality refers to the death of a patient following a surgical procedure. This research area focuses on identifying risk factors and strategies to reduce the likelihood of mortality after surgery. Factors that can contribute to postoperative mortality include the patient's overall health, the complexity and length of the surgical procedure, and the quality of postoperative care. This research is crucial for improving patient outcomes, optimizing surgical techniques, and informing healthcare practices. Studies in this area may involve analyzing large datasets, conducting clinical trials, and developing predictive models to assess and prevent postoperative mortality.