22,646
Participants
Start Date
January 1, 2014
Primary Completion Date
June 30, 2024
Study Completion Date
July 31, 2024
Exposure to major abdominal surgery
This study is a retrospective cohort study. The 'exposure' situation is based on historical records and observation, and no active intervention has been conducted on the study subjects to change their exposure status.
Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine
OTHER
Xinhua Hospital, Shanghai Jiao Tong University School of Medicine
OTHER