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Aim This systematic review and meta-analysis aimed to investigate 30- and 90-day postoperative mortality in patients undergoing emergency or elective groin hernia repair. Material and Methods This review is reported after the PRISMA 2020 guidelines. A protocol (CRD42021244412) was registered to PROSPERO. Three databases (PubMed, EMBASE, and Cochrane CENTRAL) were searched in April 2021. The identified studies were screened for eligibility and included if they reported 30- and/or 90-day mortality following emergency or elective groin hernia repair. Meta-analyses were conducted when possible, and a subgroup analysis on patients undergoing bowel resection was made. Results We included 37 studies with a total of 30,740 patients receiving emergency repair and 457,253 receiving elective repair. Meta-analyses could not be conducted for the two repair settings separately due to heterogeneity. However, the 30-day mortality ranged from 0.0–1.7% following elective repair and 0.0–11.8% following emergency repair. The risk of 30-day mortality following emergency repair was estimated to be 26-fold higher than after elective repair. A subgroup meta-analysis on bowel resection in emergency repair estimated 30-day mortality to be 7.9%. Conclusions Emergency groin hernia remains a challenging and potentially fatal surgical emergency. This review emphasizes the importance of performing hernia repair in an elective setting to prevent a potential acute presentation with acute surgical intervention. Patients presenting with symptoms of emergency groin hernias should receive particular attention to minimize the high risk of mortality and morbidity following emergency repair.

O25 MORTALITY AFTER EMERGENCY VERSUS ELECTIVE GROIN HERNIA REPAIR: A SYSTEMATIC REVIEW AND META-ANALYSIS