Abstract
Background
The recurrence rate after groin hernia repair (GHR) has been estimated to be between 1–10% in adult patients. Neither national rates nor trends in recurrence over time have been reliably established for Medicare patients in the USA.
Materials
We evaluated patients undergoing GHR (inguinal = IHR; femoral = FHR) from 2011 to 2014 from the Medicare Provider Analysis and Review database. Patients were identified using ICD-9 diagnosis and ICD-9 and CPT procedure codes, stratified both by primary vs. recurrent hernia repair and by sex. One-tailed Cochran–Armitage tests evaluated trends over time and a generalized estimating equation model estimated factors associated with recurrent IHR or FHR.
Results
We identified 407,717 patients (87.0%, ≥ 65 years) who underwent an IHR and 11,578 (91.0%, ≥ 65 years) who underwent a FHR. The proportion of IHRs for recurrence decreased statistically from 14.3% in 2011 to 13.9% in 2014 (p < 0.01) in males and was increased, but not statistically so (7.0–7.4%) in females (p = 0.08). The proportion of FHRs for recurrence was decreased, but not statistically so (16.3–14.8%, p = 0.29) in males and increased in females (5.3–6.3%, p = 0.02). On multivariable analysis, males were more than twice as likely as females to undergo recurrent repair (IHR or FHR, both p < 0.01).
Conclusions
Within the Medicare population, recurrence rates after groin hernia repairs were found to be higher than previously reported but have remained clinically stable over time. Establishing and reducing this rate is important for patient outcomes and expectations.
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Acknowledgements
The authors would like to acknowledge and thank the Mayo Clinic Department of Surgery, the Kern Center for the Science of Health Care Delivery, and Medtronic as substantial contributors of resources to this project.
Funding
The Mayo Clinic Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery provides salary support for Dr. Habermann, Dr. Murphy, and Mr. Ubl. Dr. Jianying Zhang is an employee of Medtronic and provided the analysis of the MedPAR Database. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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The authors have no conflicts of interest to disclose. Dr. Zhang is an employee of Medtronic and completed the analysis of the MedPAR database. We teamed with Medtronic to help perform the statistical analyses of the MedPAR database due to their expertise in analyzing this extensive data source. Medtronic shared in our goals of identifying the current state of hernia repairs in the United States as a whole and offered to partner with us for this study. Dr. Zhang performed the statistical analysis of the MedPAR data, which was critically evaluated and discussed among all authors. All authors were involved in data interpretation. Our agreement with Medtronic precluded financial considerations for this project.
Ethical approval
This study was reviewed by the Mayo Clinic IRB and found to be exempt as it involved de-identified data from national databases and they determined that it does not constitute research involving human subjects as defined under 45 CFR 46.102.
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This article does not contain any studies directly involving human participants, as it is a review of data already collected in a database.
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For this type of study, formal consent was not necessary.
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Murphy, B.L., Zhang, J., Ubl, D.S. et al. Surgical trends of groin hernia repairs performed for recurrence in medicare patients. Hernia 23, 677–683 (2019). https://doi.org/10.1007/s10029-018-1852-7
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DOI: https://doi.org/10.1007/s10029-018-1852-7