The investigators are aimed to develop and externally validate a prediction model of clinical risk factors that quantifies postoperative death after prolonged surgery. The investigators identify all patients undergoing prolonged surgery which the operation time \>3 h, between 2000 and 2020, within the Wuhan Union hospital and all collaborators. The surgical patient cohort will be matched with the National Death database to determine the patient's postoperative death data. 60% patients were randomly selected to the development cohort. Logistic regression analysis for prediction of postoperative death adjusted for different covariates. The model was externally validated in the remaining 40% patients.
Study Type
OBSERVATIONAL
Enrollment
500,000
National Center for Chronic and Noncommunicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention
Beijing, Beijing Municipality, China
Henan People's Hospital, Henan, China
Zhengzhou, Henan, China
Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
Wuhan, Hubei, China
Xiangya Hospital, Hunan, China
Changsha, Hunan, China
Shanxi Bethune hospital, Shanxi, China
Taiyuan, Shanxi, China
Postoperative Death
Time frame: The mortality within 5 years after the prolonged surgery
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