Abstract
The observation that patients may have worse outcomes after urgent therapeutic interventions performed during off-hours compared with on-hours is termed the "off-hour effect." This phenomenon has not been examined in urgent laparoscopic cholecystectomy (LC). Here we aimed to investigate the off-hour effect in urgent LC for acute cholecystitis. This study enrolled patients who underwent urgent LC for acute cholecystitis at our institution. On-hour LC was defined as a weekday operation starting between 9 AM and 9 PM; and off-hour LC as an operation on a weekend, or starting between 9 PM and 9 AM on a weekday. Patients were divided into on-hour and off-hour groups, and the operative outcomes of LC were compared between these groups. The study included 371 patients, with 270 (72.8%) on-hour, and 101 (27.2%) off-hour operations. The 2 groups did not significantly differ in operation time, intraoperative blood loss, conversion rate to open surgery, incidence of postoperative complications, or duration of postoperative hospital stay. Operative outcomes of urgent LC were comparable between the on-hour and off-hour groups, suggesting that there was no significant off-hour effect in urgent LC.
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