Tehran University of Medical Sciences Journal of Nutritional Sciences and Dietetics 3 3 2017 07 17 31 34 EN Sayyed Reza Sobhani Student Research Committee, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran Hassan Eini Zinab Department of Community Nutrition, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran 2017 09 06 2017 10 27 Development of instruments to measure habitual dietary intake in large epidemiological studies has been investigated extensively. The purpose of this study was to develop a computer-assisted personal interview system (CAPI) system for conducting dietary assessment. A 168-item food frequency questionnaire (FFQ), originally developed for the Tehran Lipid and Glucose Study, is used widely in food and nutrition studies in Iran. In addition to measurement errors at data recording and entry levels, the printed form is time-consuming and costly, both financially and environmentally. This technical report introduces a computer-assisted personal interviewing (CAPI) program to collect food and nutrition data using the Iranian 168-item FFQ. The U.S. Census Bureau’s CSPro software was used to construct the CAPI application. The application runs on Android devices and computers with Microsoft Windows operating systems. The language of the CAPI is Farsi. This easy-to-use CAPI tool attempts to reduce time, cost, and human error in nationwide and local nutrition research. https://jnsd.tums.ac.ir/index.php/jnsd/article/view/185 https://jnsd.tums.ac.ir/index.php/jnsd/article/download/185/212