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Effect of fasting on 24-h blood pressure values of individuals with no previous history of hypertension

Seker, Aysea; Demirci, Hakanb; Ocakoglu, Gokhanc; Aydin, Ufukd; Ucar, Hakane; Yildiz, Gurself; Yaman, Ozeng

doi: 10.1097/MBP.0000000000000244
Clinical Methods and Pathophysiology
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Objective We aimed to analyze the difference in 24-h blood pressure values during Ramadan of fasting and nonfasting individuals with no previous history of hypertension.

Patients and methods This study was planned as a multicenter research study in the cities of Izmit, Zonguldak, Sivas, and Adana. The percentage changes in the blood pressure of the patients were calculated from their blood pressure measurements at 0 h while they were resting. A Food Frequency Questionnaire was filled out by all participants.

Results Forty patients were included in the fasting group and 55 patients were included in the nonfasting group in the study. There was a difference between the two groups in percent changes of systolic measurements performed at the 4th (5% difference and P=0.020), 13th (6% difference and P=0.015), 14th (10% difference and P=0.017), 18th (9% difference and P=0.027), 19th (9% difference and P=0.020), and 20th (6% difference and P=0.014) hours with respect to the baseline measurement at the 0 h. There was a difference between the fasting and nonfasting groups in the Fasting Food Questionnaire results. Meat consumption was significantly higher in the fasting group.

Conclusion A systolic blood pressure increase in fasting patients was observed in measurements at 18:00, 19:00, and 20:00 h. We believe that an increase of more than 10% in blood pressure at the time of iftar is an important result of our study in terms of the meal preferences of the individuals under risk.

aDepartment of Nephrology, Cumhuriyet University, Sivas

bDepartment of Family Medicine, University of Health Sciences, Bursa Yuksek Ihtisas Training and Research Hospital

cDepartment of Biostatistics, Uludag University

dDepartment of Cardiovascular Surgery, University of Health Sciences, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa

eDepartment of Cardiology, Biruni University

fDepartment of Nephrology, Istanbul Yeni Yuzyil University, Istanbul

gDepartment of Menemen, Family Health Center, Menemen, Izmir, Turkey

Correspondence to Hakan Demirci, MD, Department of Family Medicine, Bursa Yuksek Ihtisas Training and Research Hospital, Yildirim, Bursa 16260, Turkey Tel: +0090536 896 33 30; fax: +0090224 239 38 40; e-mail: drhakandemirci@hotmail.com

Received October 30, 2016

Received in revised form January 24, 2017

Accepted January 28, 2017

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