Whether time of operation does not increase the mortality rate in emergency surgery?

In a retrospective analysis, Rodney AG and colleagues [1] claim that time of operation (after-hours versus day-time hours) was not associated with death in emergency surgery, and those patients who undergoing intrathoracic or intraabdominal surgery, older patients and patients with a higher ASA PS may be at a higher risk of intraoperative mortality. However, we think it is inappropriate to reach the conclusion that no association of perioperative mortality with time of day in emergency surgery.

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