en Public Health Public Health پژوهشي Original Article <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Times New Roman;"><strong>Background: </strong>The prevalence of high blood pressure is a serious concern in developing countries. The present study aimed to examine hypertension based on the quantity and quality of sleep in adults.<br> <strong>Methods:</strong> This descriptive study was conducted on the data of the first phase of Shahedieh cohort study in Yazd (Shahdieh, Zarch, and Ashkezar cities), Iran during 2015-2016. The variables of the study were assessed by the questions regarding the sleep status and blood pressure measurement. To analyze the data SPSS version 20 was used.<br> <strong>Results:</strong>&nbsp;The results showed that blood pressure in people who sleep less than 6 h &nbsp;at night was significantly higher than those who obtain 6-8 h &nbsp;night&prime;s sleep (<em>P</em> = 0.001). Moreover, the findings indicated systolic blood pressure is significantly related to taking naps during the day , using sleeping pills, and restless legs syndrome during sleep (<em>P</em> < 0.001). According to the results, 98% of the systolic blood pressure variance and 80% of the diastolic blood pressure variance were explained by the sleep-related variables.<br> <strong>Conclusion:&nbsp;</strong>Sleep duration at night is a strong predictor for systolic and diastolic blood pressure.</span></span></div> High blood pressure, Hypertension, Sleep, 90 95 http://jhehp.zums.ac.ir/browse.php?a_code=A-10-347-3&slc_lang=en&sid=1 Mahdieh Momayyezi mahdieh_momayyezi@yahoo.com 100319475328460011176 100319475328460011176 No Center for Healthcare Data Modeling, Departments of Biostatistics and Epidemiology, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. Leila Fakhravari leila74fakhravari@gmail.com 100319475328460011177 100319475328460011177 No MSc Student of Epidemiology, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. Hossein Fallahzadeh hofaab@yahoo.com 100319475328460011178 100319475328460011178 Yes Center for Healthcare Data Modeling, Departments of Biostatistics and Epidemiology, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. Masoud Mirzaei masoud_mirzaei@hotmail.com 100319475328460011179 100319475328460011179 No Center for Healthcare Data Modeling, Departments of Biostatistics and Epidemiology, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.