Abstract
The authors investigated whether there is an association between angiotensin-converting-enzyme inhibitor (ACEI)/angiotensin II receptor blocker (ARB) users with hemorrhoids. A total of 21,670 ACEI users and 21,670 ARB users during 2000 - 2012 from a national health insurance database were included. Hemorrhoid incidences were monitored to the end of 2013. To examine the risk of hemorrhoids, the Cox proportional hazard model and the Kaplan-Meier method were used. The incidence rate of hemorrhoids in ARB users was 6.64 per 1000 person-years, which was higher than that of the ACEI users (5.48 per 1000 person-years). The adjusted hazard ratio of hemorrhoids in patients who received ACEI relative to those who received ARB was 0.83 (95% confidence intervals [CI] = 0.75, 0.92). Compared to ARB users, patients who used ACEI more than 740 days per year (adjusted hazard ratios = 0.44; 95% CI = 0.36, 0.54) and more than 7800 mg (adjusted hazard ratios = 0.54; 95% CI = 0.46, 0.65) had a lower risk of hemorrhoids. ACEI users who took a relatively long period or high cumulative dosage were found to less prone to develop hemorrhoids.
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