NUTRITION RESEARCH PROJECTSAccuracy of Waist to Hip Ratio Calculated by Bioelectric Impedance Device in the Ravansar Non-Communicable Disease Cohort StudyPasdar, Yahya PhD; Moradi, Shima MSc; Abdollahzad, Hadi PhD; Hamzeh, Behrooz PhD; Najafi, Farid PhD; Nachvak, Seyed Mostafa PhD; Mostafai, Roghayeh MScAuthor Information Department of Nutritional Sciences, Research Center for Environmental Determinants of Health (RCEDH), Health Institute (Drs Pasdar, Abdollahzad, and Nachvak and Mss Moradi and Mostafai), School of Public Health (Dr Hamzeh), and Department of Epidemiology, School of Public Health, Communing Developmental and Health Promotion Research Center (Dr Najafi), Kermanshah University of Medical Sciences, Kermanshah, Iran. Correspondence: Hadi Abdollahzad, PhD, or Shima Moradi, MSc, Department of Nutritional Sciences, Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran (email@example.com, firstname.lastname@example.org or Shima.Moradi@kums.ac.ir). H. Abdollahzad and Sh. Moradi contributed equally to the conception and design of the research.RaNCD is part of PERSIAN national cohort. The authors thank Professor Reza Malekzadeh, Deputy of Research and Technology at the Ministry of Health and Medical Education of Iran, and Director of the PERSIAN cohort, and also Dr Hossein Poustchi, Executive Director of PERSIAN cohort, for all their supports during design and running of RaNCD.The authors have disclosed that they have no significant relationships with, or financial interest in, any commercial companies pertaining to this article. Topics in Clinical Nutrition: October/December 2019 - Volume 34 - Issue 4 - p 269-276 doi: 10.1097/TIN.0000000000000190 Buy Metrics Abstract The objective of this study was to determine the accuracy of waist to hip ratio (WHR) measured by a bioelectric impedance analysis (BIA) device for 9965 participants in a cohort study. Waist and hip circumferences were measured manually using a nonstretched, flexible tape, and WHR was calculated. Waist circumference was measured at the level of the iliac crest 3 times, and the average of 3 measurements was recorded. Body composition analysis was also done with the BIA device, and comparisons were made between the 2 techniques. There was a weak correlation for WHR compared using the manual method and BIA (r = 0.036). Also, there was a significant difference between the 2 measurement methods (P < .001). © 2019 Wolters Kluwer Health, Inc. All rights reserved.