研究单位：[1]JinlingH,Nanjing,Jiangsu,China,210002[2]Peking Union Medical College Hospital[3]Chinese PLA General Hospital[4]First Affiliated Hospital, Sun Yat-Sen University[5]Xijing Hospital[6]West China Hospital[7]Xinqiao Hospital of Chongqing[8]Second Affiliated Hospital, School of Medicine, Zhejiang University[9]Changhai Hospital[10]Shanghai 10th People's Hospital[11]The Second Affiliated Hospital of Harbin Medical University[12]The Affiliated Hospital of Qingdao University[13]First Affiliated Hospital of Kunming Medical University
研究目的：
It is a study to evaluate the relationship between preoperative nutritional assessment and clinical outcomes and to explore the effect of preoperative nutritional support on clinical outcomes in patients after abdominal operation.
