Age and Regional Trends in Groin Hernia Surgery in Japan: An Analysis of Laparoscopic Repair, Outpatient Surgery, and Manual Reduction Using National Database Open Data

CONCLUSIONS: Nationwide claims-based data reveal pronounced age- and sex-specific patterns in groin hernia management in Japan. These findings highlight substantial demographic differences in surgical burden, procedural selection, and manual reduction activity, underscoring the value of population-based data for understanding contemporary groin hernia care in an aging society.