Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 53 5 2024 05 05 1104 1114 Ana Pjevac Department of Public Health, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia Teodora Safiye Department of Psychology, State University of Novi Pazar, Novi Pazar, Serbia Elvis Mahmutovic Department of Biomedical Sciences, State University of Novi Pazar, Novi Pazar, Serbia Ardea Milidrag Department of Public Health, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia Aleksandar Radlovic Department of Public Health, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia Zaklina Rajkovic Department of Public Health, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia Sonja Milosavljevic Department of Public Health, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia Andjela Gogic Department of Medical Statistics and Informatics, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia Mirjana Jovanovic 1. Psychiatric Clinic, University Clinical Hospital Center of Kragujevac, Kragujevac, Serbia 2. Department of Psychiatry, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia 2024 03 04 2024 05 05 Background: The term "internet addiction" (IA) describes a compulsive behavior associated with any online activity that disrupts everyday social interactions. Main aim of this research was to determine variables and development predictors of Internet addiction. Methods: A total of 1,669 respondents participated in this research; 1,040 of them (62.3%) were female, 590 (35.4%) were male, and 39 (2.3%) did not want to declare their gender. The average age of the respondents was 15.09±1.757. Data were collected using an online form consisted of demographic data, questions related to the use of the Internet, the Internet Addiction Scale, and the Temperament Evaluation of Memphis, Pisa, Paris, and San Diego-auto questionnaire version (TEMPS-A) for adolescents. Results: The relationship between Internet addiction and age, addictive substance use frequency, purpose, time spent on the internet, and type of temperament has been proven. Analysis results indicate that the risk of developing internet addiction is higher if an adolescent spends 1-3 hours and more than 3 hours daily (2.8 and 8.2 times, respectively). Increasing age numbers for 1 unit (year), the risk of internet addiction developing is decreasing by 11.3%. Hyperthymic temperament type decreases the risk of 70.9% of internet addiction developing. Conclusion: It is important to highlight importance of our results since practitioners can utilize our findings to create targeted treatments and prevent internet addiction in adolescents. https://ijph.tums.ac.ir/index.php/ijph/article/view/34813 https://ijph.tums.ac.ir/index.php/ijph/article/download/34813/8240