en Cardiology Cardiology Original Article Original Article <span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="line-height:14pt"><b><i><span style="color:blue">Background:</span></i></b> Hypertension (HTN) is one of the primary risk factors for heart disease and stroke worldwide. The present meta-analysis was aimed to systematically review and statistically estimate the prevalence rate of pre-hypertension (PHTN) and HTN in the Iranian child/adolescent and adult age groups. </span><br> <span style="line-height:14pt"><b><i><span style="color:blue">Methods</span></i></b><i><span style="color:blue">:</span></i> In this study, four International databases, including PubMed, Scopus, Web of Science, and Cochrane, as well as three Iranian databases, including SID, Magiran, and IranMedex, were separately investigated for articles published before December 2021. Also, we estimated the pooled effect size for the prevalence of PHTN and HTN in children/adolescent and adult age groups. Stata software (version 14.0) was used for all statistical analyses.</span><br> <span style="line-height:14pt"><b><i><span style="color:blue">Results</span></i></b><i><span style="color:blue">:</span></i> From a total of 1185 articles found in database searches, fifty-one were included in the meta-analysis. The prevalence of HTN in the Iranian adult population was 26.26% (25.11 % and 26.22 % for women and men, respectively). Meanwhile, the prevalence of PHTN and HTN in the child/adolescent age group was 8.97% (95% CI 7.33 - 10.61) and 8.98% (95% CI 7.59 - 10.36), respectively.</span><br> <span style="line-height:14pt"><b><i><span style="color:blue">Conclusions:</span></i></b> This study provides information which can be used for various purposes, including study designing. Further nationwide surveys should be carried out to obtain accurate information on the HTN prevalence rate, particularly based on the American College of Cardiology /American Heart Association guidelines in the Iranian population.<b><i><span style="color:#0033cc"></span></i></b></span></span></span><br> &nbsp; Hypertension, ACC/AHA guidelines, Iran 607 617 http://caspjim.com/browse.php?a_code=A-10-2988-1&slc_lang=en&sid=1 Salman Mohammadi s.mohammadi.diet@gmail.com 100319475328460044851 100319475328460044851 No Department of Nutrition, School of Health and Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran Soheil Hassanipour soheil.epid@gmail.com 100319475328460044852 100319475328460044852 No Cardiovascular Diseases Research Center, Department of Cardiology, Heshmat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran Hamed Delam hameddelam8@yahoo.com 100319475328460044853 100319475328460044853 No Student Research Committee, Larestan University of Medical Sciences, Larestan, Iran Hossein-Ali Nikbakht ep.nikbakht@gmail.com 100319475328460044854 100319475328460044854 No Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran Zohreh Ghaem Far zohreh.ghaemfar@gmail.com 100319475328460044855 100319475328460044855 No Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran Donya Firoozi donyafiroozi@gmail.com 100319475328460044856 100319475328460044856 No Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran Elnaz Ghaem Far elnaz.ghaemfar@gmail.com 100319475328460044857 100319475328460044857 No Department of Clinical Nutrition, South Tehran Branch, Islamic Azad University, Tehran, Iran Hamid Abdolazimi Hami.abdolazimi71@gmail.com 100319475328460044858 100319475328460044858 No Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran Ali Ghaffarian-Bahraman ghafarian91@gmail.com 100319475328460044859 100319475328460044859 Yes Occupational Environment Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran