Sex disparities in the treatment and outcomes of ventral and incisional hernia repair.

Abstract

Despite females accounting for nearly half of ventral and incisional hernia repairs performed each year in the United States, shockingly little attention has been paid to sex disparities in hernia treatment and outcomes. We explored sex-based differences in operative approach and outcomes using a population-level hernia registry. We performed a retrospective review of the Michigan Surgical Quality Collaborative Hernia Registry (MSQC-HR) to identify patients undergoing clean ventral or incisional hernia repair between January 1, 2020 to December 31, 2021. The primary outcomes were risk-adjusted rates of laparoscopic/robotic approach, mesh use, and composite 30-day adverse events stratified by sex. Risk adjustment between sex was performed using all patient, clinical, and hernia characteristics. 5269 patients underwent ventral and incisional hernia repair of whom 2295 (43.6%) patients were female. Mean age was 53.9 (14.5) years. Females had slightly larger hernias (3.5cm vs. 3.0cm, P < 0.001), fewer umbilical hernias (50.9% vs. 73.0%, P < 0.001), and a higher prevalence of prior hernia repair (17.9% vs. 13.4%, P < 0.001). In a multivariable logistic regression adjusting for differences between males and females, female sex was associated with lower odds of mesh use [aOR 0.62 (95% CI 0.52-0.74)] and higher odds of laparoscopic/robotic repair [aOR 1.26 (95% CI 1.10-1.44)]. In a similar multivariable model, female sex was also associated with significantly higher odds of composite 30-day adverse events [aOR 1.64 (95% CI 1.32-2.02)]. This equates to predicted probabilities of 11.7% (95% CI 10.3-13.0%) vs. 7.6% (95% CI 6.6-8.6%) for adverse events in females compared to males. Despite being younger and having fewer comorbidities, women were more likely to experience adverse events after surgery. Moreover, women were less likely to have mesh placed. Additional work is needed to understand the factors that drive these gender disparities in ventral hernia treatment and outcomes.