Study Associates Nocturnal Trips to the Loo with High Blood Pressure

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Results from a recent study suggest that those who frequent the toilet during the night are likely to notice an increase in the blood pressure.

Study author Dr. Satoshi Konno, of the Division of Hypertension, Tohoku Rosai Hospital, Sendai, Japan says, “Our study indicates that if you need to urinate in the night—called nocturia—you may have elevated blood pressure and/or excess fluid in your body. If you continue to have nocturia, ask your doctor to check your blood pressure and salt intake.” Compared to western countries, people in Japan consume more salts due to their preference for seafood and soy sauce-based food, and therefore are more susceptible to blood pressure increase resulting from salt consumption. Previous studies have also established that high salt intake and nocturia are linked. Both these factors provide evidence that people in Japan are more likely to develop high blood pressure.

Researchers analyzed data of 3,749 residents of Watari, Japan who had enrolled for an annual health check-up in 2017. The information collected was participants’ blood pressure and details of nocturia (through a questionnaire). Researchers noticed a significant association between nocturia and hypertension (blood pressure 140/90 mmHg or higher), and the risk increased along with an increase in the number of nocturia events in a single night. Dr. Konno noted, “We found that getting up in the night to urinate was linked to a 40% greater chance of having hypertension. And the more visits to the toilet, the greater the risk of hypertension.”

Dr. Mutsuo Harada, press coordinator for Japanese Circulation Society 2019 added that early detection and management of hypertension are very important to prevent cardiovascular diseases. He also pointed out that nocturia is not only caused by urinary organ problems but also by systemic diseases such as hypertension.

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