“…There are considerable differences among patients undergoing emergency laparotomy, not only in the indication for surgery (9,10) and the presence of co-morbidities (11), but also in factors related to the delivery of care (12). Outcomes are worse for older, frail patients (13) as well as for patients from ethnic minorities, lower socioeconomic groups and those who are uninsured (14,15). Although it is di cult to control for patient factors, evidence points to wide variability in the processes of the delivery of care (4,12,16).…”