BACKGROUND: Previous studies have reported a higher prevalence of inguinal hernia in patients with abdominal aortic aneurysm (AAA). The aim of this study was to explore the association between inguinal hernia and AAA in a large population-based cohort of men who had screening for AAA. METHODS: A total of 18,331 men aged 65-76 years had ultrasound screening for AAA in the Central Region of Denmark from 2008 to 2010. The Danish National Patient Registry was interrogated, and screened men registered with an inguinal hernia from 1977 to 2011 were identified. The association between inguinal hernia and AAA was assessed by multiple logistic regression analysis. RESULTS: The prevalence of AAA was 3.3 per cent (601 of 18,331). A total of 2936 (16.0 per cent) of the 18,331 patients were registered with a diagnosis of inguinal hernia or hernia repair. Inguinal hernia was not associated with AAA: crude odds ratio (OR) 0.86 (95 per cent confidence interval 0.68 to 1.09) and adjusted OR 0.94 (0.75 to 1.20). CONCLUSION: In contrast to smaller patient-based studies, this large population-based study found no association between inguinal hernia and AAA.
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