Masked hypertension in patients with irritable bowel syndrome.

Abstract

Background: The pathophysiology of irritable bowel syndrome (IBS) and masked hypertension (mHT) exhibits shared characteristics, including factors such as anxiety and stress. Consequently, the aim of this study was to investigate the frequency of mHT in patients with IBS.

Method: Patients diagnosed with IBS in 2020-2023 were re-evaluated using the Rome IV criteria. Patients who did not have sustained HT, as evidenced by repeated in-office blood pressure (BP) measurements and who did not meet the exclusion criteria (chronic renal failure, heart failure, diabetes, cerebrovascular events, pregnancy or puerperium) were included in the study group. A control group was also constituted with the same number of age and gender-matched healthy individuals. The participants were connected to a 24-hour ambulatory BP monitor and the results were analyzed.

Results: Total 128 participants, including 64 IBS patients and 64 healthy individuals, were included in our study. The age (36.9 ± 7.3 years; 37.3 ± 7.7 years) and gender (62.5% female; 62.5% female) distributions and the baseline clinical characteristics of the study and control groups were similar. The in-office systolic BP measurements of the IBS patients were significantly higher than those of the control group (124.7 ± 5.4 mmHg compared to 121.8 ± 5.2 mmHg, p = 0.02). The IBS patients also had a higher frequency of mHT (n = 21, 32.8% compared to n = 10, 15.6%, p = 0.02), higher 24-hour daytime systolic BP (127.5 ± 7.6 mmHg compared to 124.8 ± 5.22 mmHg, p = 0.02) and higher nighttime diastolic BP (62.2 ± 7.5 mmHg compared to 59.6 ± 6.1 mmHg, p = 0.03) than the control group. The study group included all four sub-types of IBS: diarrhea-dominant (IBS-D), constipation-dominant (IBS-C), mixed type (IBS-M) and unclassified (IBS-U). It was determined that 57.9% of the IBS-C patients, 27.8% of the IBS-M patients, 23.5% of the IBS-D patients and 10% of the IBS-U patients in the study group had mHT.

Conclusion: To the best of our knowledge, this is the first study demonstrating a relationship between IBS and mHT. The frequency of mHT was higher among patients with IBS compared to healthy controls (p = 0.02). Studies on larger patient groups are needed to evaluate the frequency of mHT for the IBS sub-types.