Day of the Week and Time of Day: Does Scheduling Impact Surgical Outcomes?

Scheduling may affect surgical outcomes through poorly controlled factors such as fatigue, staffing patterns, and limited specialty-specific operating room support. We retrospectively analyzed all patients undergoing elective abdominal general surgery from 2016–2025 using a 69+ hospital Michigan Surgical Quality Collaborative clinical quality improvement registry. We fit multivariable logistic regression models to test associations between postoperative complications and operative start time and operative day, adjusting for patient covariates.

About the Presenters

Wenjing Wang earned an MS in Epidemiology from the University of Maryland, and a BS in Dental Science from Peking University (China). She is currently the Lead Statistician at the Michigan Surgical Quality Collaborative (MSQC).


Yuxuan Chen earned a Master of Health Informatics (MHI) and a Bachelor of Science in Information (BSI), with a minor in Computer Science, from the University of Michigan. She is a Data Engineer at MSQC, and has previously worked in clinical data warehousing, critical care research, and medical image computing.