Comparison of laparoscopic and open inguinal hernia repair in adults: A retrospective cohort study using a medical claims database

Introduction: This study aimed to investigate and compare the surgical complications following laparoscopic inguinal hernia repair (LIHR) with those following open inguinal hernia repair (OIHR). Methods: This was a retrospective cohort study based on nationwide claims data. We extracted the data of patients aged >= 20 years who underwent inguinal hernia repair (IHR) between 2009 and 2020. The primary outcome was postoperative complication of IHR, and the secondary outcomes were recurrence of hernia and length of hospital stay. Patient characteristics were adjusted with propensity score (PS) matching, the annual proportions of LIHR versus OIHR were summarized, and the surgical outcomes of each IHR were analyzed. Results: Of the 15 728 eligible patients, 6512 underwent LIHR. The proportion of LIHR increased from 14.7% to 52.8% annually during the study period. From the analysis of 6060 pairs created by PS matching, the risk of surgical site infection (odds ratio [OR] 0.70; 95% confidence interval [CI] 0.56-0.86; P = .0007), and acute postoperative pain (OR 0.69; 95% CI 0.60-0.79; P < .0001), and chronic postoperative pain (OR 0.83; 95% CI 0.70-0.98; P = .0291) were significantly lower with LIHR than with OIHR. The recurrent rate was not significantly different between the LIHR and OIHR groups (OR, 0.68; 95% CI 0.45-1.01; P = .0558). Furthermore, no significant difference was found in the length of hospital stay between the LIHR and OIHR groups (2.91 +/- 1.94 days vs 2.97 +/- 2.61 days, difference +/- SE: 0.06 +/- 0.04, P = .1307). Conclusion: LIHR might be superior to OIHR in terms of fewer surgical complications and might be preferred over OIHR in the future.