Long term survival in adult patients undergoing major abdominal surgery

In this study we will use patient data from a single centre to investigate the association of post-operative complications and mortality in adult patients undergoing major abdominal surgery. In using routinely collected in-hospital data, this study will also identify independent risk factors for post-operative complications including (but not limited to) mortality, length of stay, and new co-morbidities. There is no direct patient involvement, only the retrospective collection of patient data from their electronic medical records. Each patients' data will only be collected once and the period for which the data will be collected will from the start of their major abdominal surgery (surgical incision) to their date of hospital discharge. All patients who underwent major abdominal surgery between July 2010 to April 2021 will have their data collected. In addition, through the electronic medical records and the Births and Deaths registry Victoria, date of death will be established. There will be no prospective collection of any other data. Patients will not be contacted at any point. The types of data collected will be data-linkage only. From the data collected from the electronic medical records, we will describe the baseline characteristics of those patients who. We will seek to summarise their intraoperative course and collect data on their postoperative outcomes, including complications.