Preoperative Sedentary Time Predicts Postoperative Complications in Gastrointestinal Cancer.

BACKGROUND Gastrointestinal cancer has a high global prevalence. Postoperative complications (PCs) affect the length of hospital stay and long-term outcomes. However, it is unclear whether preoperative sedentary time is associated with PCs, independently of physical activity (PA). We aimed to investigate the association between preoperative sedentary time and PCs independently of PA in patients who underwent surgery for gastrointestinal cancer. METHODS In this prospective study, we included 112 patients who underwent colorectal cancer or gastric cancer surgery. Patient characteristics and surgery-related variables were collected. The Japanese version of the International Physical Activity Questionnaire (the usual 7-day short version) was used to assess preoperative PA and sedentary time. Patients were classified into two groups according to the grade of PCs: Clavien-Dindo (CD) grade.