Hernia : the journal of hernias and abdominal wall surgery · 2026
Retrospective empirical analysis of the success rate of inguinal hernia operations in outpatient and inpatient sectors: a cohort study.
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Wiemschulte Julius, Messerle Robert, Schreyögg Jonas
Аннотация
INTRODUCTION: In Germany, the proportion of outpatient surgeries was low during the study period (2014-2019) and low by international standards. Less than 20% of inguinal hernias are treated on an outpatient basis. Hybrid DRGs are intended to promote outpatient treatment, but their impact on the quality of care and referral criteria has not been sufficiently investigated empirically.
METHODS: A retrospective analysis of routine data included 90,512 cases from 41 company health insurance funds, spanning 2014 to 2019. These were analysed descriptively in terms of care sector, age, and surgical procedure, as well as through two logistic regressions on reoperations and complications, including interaction effects.
RESULTS: The proportion of outpatient surgeries is already below 40 % in adults and continues to decline with increasing age. The choice of procedure differs significantly between sectors. The regressions explain only 3.3 % and 4 % of the variance, respectively, meaning that the variables have only a minor impact on the success of the surgery. Inpatient surgeries are associated with fewer reoperations and more complications, although the absolute effect size is small. The surgical procedures have a significant influence. There are no relevant interaction effects between the choice of sector and the other variables.
DISCUSSION: A sector-specific allocation based on the analysed parameters cannot be justified based on evidence. Since inpatient procedures do not show consistent superiority, there is no medical advantage over outpatient procedures. A cost-adjusted design of hybrid DRGs appears necessary to enable indication-appropriate procedure selection and to avoid potential misguided incentives that compromise the quality of care.
METHODS: A retrospective analysis of routine data included 90,512 cases from 41 company health insurance funds, spanning 2014 to 2019. These were analysed descriptively in terms of care sector, age, and surgical procedure, as well as through two logistic regressions on reoperations and complications, including interaction effects.
RESULTS: The proportion of outpatient surgeries is already below 40 % in adults and continues to decline with increasing age. The choice of procedure differs significantly between sectors. The regressions explain only 3.3 % and 4 % of the variance, respectively, meaning that the variables have only a minor impact on the success of the surgery. Inpatient surgeries are associated with fewer reoperations and more complications, although the absolute effect size is small. The surgical procedures have a significant influence. There are no relevant interaction effects between the choice of sector and the other variables.
DISCUSSION: A sector-specific allocation based on the analysed parameters cannot be justified based on evidence. Since inpatient procedures do not show consistent superiority, there is no medical advantage over outpatient procedures. A cost-adjusted design of hybrid DRGs appears necessary to enable indication-appropriate procedure selection and to avoid potential misguided incentives that compromise the quality of care.